Subtraction: Up to 7

Ages 4–7 · 7 minutes · Math

Learn to subtract small numbers up to 7

In this lesson, the student gets more practice subtracting small numbers. They will get practice subtracting via story problems. They will also try some story problems without pictures for some mental math practice.

Part of

Learn to Subtract

Standards alignment

Common Core State Standards

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
1.OA.C.5 — Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.5 — Fluently add and subtract within 5.

Alabama

MA19.K.9 — Solve addition and subtraction word problems, and add and subtract within 10, by using concrete objects or drawings to represent the problem.
MA19.K.8 — Represent addition and subtraction up to 10 with concrete objects, fingers, pennies, mental images, drawings, claps or other sounds, acting out situations, verbal explanations, expressions, or equations.
MA19.K.5 — Count to answer "how many?" questions.

Alaska

K.OA.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps) acting out situations, verbal explanations, expressions, or equations.
K.OA.2 — Add or subtract whole numbers to 10 (e.g., by using objects or drawings to solve word problems).
1.OA.1 — Use addition and subtraction strategies to solve word problems (using numbers up to 20), involving situations of adding to, taking from, putting together, taking apart and comparing, with unknowns in all positions, using a number line (e.g., by using objects, drawings and equations). Record and explain using equation symbols and a symbol for the unknown number to represent the problem.
1.OA.5 — Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).

Arizona

K.OA.A.2 — Solve addition and subtraction word problems and add and subtract within 10. See Table 1.
K.OA.A.1 — Represent addition and subtraction concretely. See Table 1.
K.OA.A.5 — Fluently add and subtract within 5.

Arkansas

K.CAR.1. — Use objects, fingers, mental images, drawings, sounds, acting out situations, or verbal explanations to represent addition and subtraction from 0 to 10.
K.CAR.5 — Solve real-world problems involving addition and subtraction within 10, using objects, drawings, or equations to represent the problem.
K.CAR.4 — Use manipulatives and various strategies to fluently add and subtract within 10.
K.NPV.2 — Count a set of objects up to 20 using one-to-one correspondence, demonstrating that the last number stated indicates the number of objects in the set regardless of the arrangement.

California

K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
1.OA.C.5 — Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
K.OA.A.5 — Fluently add and subtract within 5.
1.OA.A.1 — Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Colorado

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings (drawings need not show details, but should show the mathematics in the problem), sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
P.OA.A.2 — Solve addition and subtraction problems set in simple contexts. Add and subtract up to at least five to or from a given number to find a sum or difference up to 10.
P.CC.C.4 — Use the number name of the last object counted to answer “How many?” questions for up to approximately 10 objects.

Connecticut

K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
1.OA.A.1 — Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
1.OA.C.5 — Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).

Delaware

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.5 — Fluently add and subtract within 5.
1.OA.A.1 — Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Florida

MA.K.AR.1.3 — Solve addition and subtraction real-world problems using objects, drawings or equations to represent the problem.
MA.K.NSO.3.1 — Explore addition of two whole numbers from 0 to 10, and related subtraction facts.
MA.K.NSO.3.2 — Add two one-digit whole numbers with sums from 0 to 10 and subtract using related facts with procedural reliability.

Georgia

K.NR.5.2 — Represent addition and subtraction within 10 from a given authentic situation using a variety of representations and strategies.
K.NR.5.3 — Use a variety of strategies to solve addition and subtraction problems within 10.
K.NR.5 — Explain the concepts of addition, subtraction, and equality and use these concepts to solve real-life problems within 10.
K.NR.5.4 — Fluently add and subtract within 5 using a variety of strategies to solve practical, mathematical problems.

Hawaii

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.5 — Fluently add and subtract within 5.
1.OA.C.5 — Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).

Idaho

K.OA.A.2 — Solve addition and subtraction word problems within ten by using physical, visual, and symbolic representations.

Illinois

K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
1.OA.A.1 — Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
K.OA.A.5 — Fluently add and subtract within 5.

Indiana

K.CA.1 — Solve real-world problems that involve addition and subtraction within 10 using modeling with objects or drawings. (E)
K.NS.3 — Say the number names in standard order when counting objects, pairing each object with one and only one number name and each number name with one and only one object. Understand that the last number name said describes the number of objects counted and that the number of objects is the same regardless of their arrangement or the order in which they were counted. Count out the number of objects, given a number from 1 to 20. (E)
1.CA.2 — Solve real-world problems involving addition and subtraction within 20 in situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all parts of the addition or subtraction problem (e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem). (E)

Iowa

K.OA.A.2 — Add and subtract within 10 and solve word problems involving the different problem types listed below. For example, by using objects or drawings to represent the problem. • Add-to with result unknown. • Take-from with result unknown. • Put-together/take-apart with total unknown. • Put-together with both addends unknown. (See Problem Types Table 1 in Appendix A)
1.OA.IA.C.2 — Fluently add and subtract within 10 using efficient mental strategies. • Counting on. • Making ten. • Decomposing a number leading to a ten. • Using the relationship between addition and subtraction. • Creating equivalent, but easier or known sums. • Counting up to subtract. By the end of Grade 1, flexibly, efficiently, and accurately find all sums within 10.
K.OA.A.1 — Represent addition and subtraction situations in a variety of ways. For example, with objects, fingers, mental images, drawings, sounds (claps), acting out situations, verbal explanations, expressions, or equations.
1.OA.IA.C.1 — Use counting and subitizing strategies to explain addition and subtraction.

Kansas

K.OA.2 — Solve addition and subtraction word problems, and add and subtract within 10, (e.g. by using objects or drawings to represent the problem.)
K.CC.5 — Count to answer “how many?” up to 20 concrete or pictorial objects arranged in a line, a rectangular array, or a circle, or as many as 10 objects in a scattered configuration; given a number from 1 to 20, count out that many objects.
K.OA.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g. claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.5 — Fluently (efficiently, accurately, and flexibly) add and subtract within 5.

Kentucky

KY.K.OA.2 — Solve addition and subtraction word problems and add and subtract within 10 by using objects or drawings to represent the problem.
KY.1.OA.1 — Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart and comparing, with unknowns in all positions.
KY.K.OA.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds, acting out situations, verbal explanations, expressions, or equations.
KY.1.OA.6.a — Fluently add and subtract within 10.

Louisiana

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
K.CC.B.5 — Count to answer "how many?" questions.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.

Maine

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, (e.g., by using objects or drawings to represent the problem).
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.CC.B.5 — Count to answer “how many?” questions about as many as 20 things arranged in a line, a rectangular array, or a circle, or as many as 10 things in a scattered configuration; given a number from 1-20, count out that many objects.

Maryland

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.5 — Fluently add and subtract within 5.

Massachusetts

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.5 — Fluently add and subtract within 5, including zero.

Michigan

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.5 — Fluently add and subtract within 5.

Minnesota

1.1.2.1 — Use words, pictures, objects, length-based models (connecting cubes), numerals and number lines to model and solve addition and subtraction problems in part-part-total, adding to, taking away from and comparing situations.
K.1.2.1 — Use objects and draw pictures to find the sums and differences of numbers between 0 and 10.
1.2.2.1 — Represent real-world situations involving addition and subtraction basic facts, using objects and number sentences. For example: One way to represent the number of toys that a child has left after giving away 4 of 6 toys is to begin with a stack of 6 connecting cubes and then break off 4 cubes.
1.2.2.4 — Use addition or subtraction basic facts to represent a given problem situation using a number sentence. For example: 5 + 3 = 8 could be used to represent a situation in which 5 red balloons are combined with 3 blue balloons to make 8 total balloons.

Mississippi

K.OA.1 — Represent addition and subtraction, in which all parts and whole of the problem are within 10, with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations,verbal explanations, expressions, or equations.
K.OA.2 — Solve addition and subtraction word problems within 10 involving situations of adding to, taking from, putting together and taking apart with unknowns in all positions by using objects or drawings to represent the problem.
K.OA.5 — Fluently add and subtract within 5.
K.CC.5 — Count to answer “how many?” questions about as many as 20 things arranged in a line, a rectangular array, or a circle, or as many as 10 things in a scattered configuration; given a number from 1–20, count out that many objects.

Missouri

K.RA.A.1 — Represent addition and subtraction within 10.
1.RA.A.1 — Use addition and subtraction within 20 to solve problems.
1.RA.C.8 — Demonstrate fluency with addition and subtraction within 10.
K.RA.A.2 — Demonstrate fluency for addition and subtraction within 5.

Montana

K.OA.A.2 — Solve addition and subtraction word problems from a variety of cultural contexts, including those of Montana American Indians, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.5 — Fluently add and subtract within 5.
K.CC.B.5 — Count to answer "how many?" questions about as many as 20 things arranged in a line, a rectangular array, or a circle, or as many as 10 things in a scattered configuration; given a number from 1-20, count out that many objects from a variety of cultural contexts, including those of Montana American Indians.

Nebraska

K.N.4.a — Represent and explain addition and subtraction as part-whole relationships, with addition as putting together and/or adding to and subtraction as taking apart and/or taking from, using objects, drawings, numbers, and equations.
K.N.4.e — Solve authentic problems that involve addition and subtraction within 10 (e.g., by using objects, drawings, and equations to represent the problem).
K.N.4 — Number and Algebraic Relationships: Students will understand and demonstrate the meaning of addition and subtraction.
1.N.4.b — Efficiently, flexibly, and accurately add and subtract within 10.

Nevada

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.

New Hampshire

K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
1.OA.C.5 — Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
K.OA.A.5 — Fluently add and subtract within 5.
1.OA.A.1 — Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

New Jersey

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
K.OA.A.1 — Represent addition and subtraction up to 10 with objects, fingers, mental images, drawings , sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
1.OA.A.1 — Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

New Mexico

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.5 — Fluently add and subtract within 5.

New York

NY-K.OA.2.a — Add and subtract within 10.
NY-K.OA.2.b — Solve addition and subtraction word problems within 10.
NY-K.OA.1 — Represent addition and subtraction using objects, fingers, pennies, drawings, sounds, acting out situations, verbal explanations, expressions, equations, or other strategies.
NY-K.OA.5 — Fluently add and subtract within 5.
NY-1.OA.5 — Relate counting to addition and subtraction.

North Carolina

NC.K.OA.1 — Represent addition and subtraction, within 10: • Use a variety of representations such as objects, fingers, mental images, drawings, sounds, acting out situations, verbal explanations, or expressions. • Demonstrate understanding of addition and subtraction by making connections among representations.
NC.K.OA.2 — Solve addition and subtraction word problems, within 10, using objects or drawings to represent the problem, when solving: • Add to/Take From-Result Unknown • Put Together/ Take Apart (Total Unknown and Two Addends Unknown)
NC.K.OA.5 — Demonstrate fluency with addition and subtraction within 5.

North Dakota

K.AR.OA.5 — Solve authentic word problems with subtraction by taking apart or taking from within 10.
1.AR.OA.1 — Automatically add and subtract within 10.
K.AR.OA.1 — Automatically add and subtract within 5.

Ohio

K.OA.2 — Solve addition and subtraction problems (written or oral), and add and subtract within 10 by using objects or drawings to represent the problem.
1.OA.1 — Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.
K.OA.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds such as claps, acting out situations, verbal explanations, expressions, or equations. Drawings need not show details, but should show the mathematics in the problem.
K.OA.5 — Fluently add and subtract within 5.

Oklahoma

1.N.2.1 — Represent and solve problems using addition and subtraction with sums and minuends of up to 10.
K.N.2 — Develop conceptual understanding with addition and subtraction (up to 10) using objects and pictures.
1.N.2 — Solve addition and subtraction problems with sums and minuends of up to 10 in real-world and mathematical contexts.
1.N.2.3 — Demonstrate fluency with basic facts of addition and subtraction with sums and minuends of up to 10.

Oregon

K.OA.A.1 — Represent addition as putting together and adding to and subtraction as taking apart and taking from using objects, drawings, physical expressions, numbers or equations.
K.OA.A.2 — Add and subtract within 10. Model authentic contexts and solve problems that use addition and subtraction within 10.
1.OA.C.5 — Relate counting to addition and subtraction.
K.OA.A.5 — Fluently add and subtract within 5 with accurate, efficient, and flexible strategies.

Pennsylvania

CC.2.2.K.A.1 — Extend the concepts of putting together and taking apart to add and subtract within 10.
CC.2.1.K.A.2 — Apply one-to-one correspondence to count the number of objects.
CC.2.2.PreK.A.1 — Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
CC.2.2.1.A.1 — Represent and solve problems involving addition and subtraction within 20.

Rhode Island

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
1.OA.C.5 — Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.5 — Fluently add and subtract within 5 including zero.

South Carolina

K.ATO.1 — Model situations that involve addition and subtraction within 10 using objects, fingers, mental images, drawings, acting out situations, verbal explanations, expressions, and equations.
K.ATO.2 — Solve real-world/story problems using objects and drawings to find sums up to 10 and differences within 10.
K.ATO.5 — Add and subtract fluently within 5.
K.PS.2d — Connect the meaning of mathematical operations to the context of a given situation.

South Dakota

K.OA.A.2 — Solve addition and subtraction word problems.
K.OA.A.2.a — Solve addition and subtraction word problems (within 10), involving result unknown problems, put together/take apart total unknown, and put together/take apart addend unknown, e.g., using objects or drawings to represent the problem. (see appendix for K-2 Common Addition and Subtraction Situations).
K.OA.A.2.b — Add and subtract within 10, eg., by using objects or drawings to represent the problem.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.CC.B.5 — Count to answer "how many?"

Tennessee

K.OA.A.2 — Add and subtract within 10 to solve contextual problems with result/total unknown involving situations of add to, take from, and put together/take apart. Use objects, drawings, or equations to represent the problem.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, drawings, acting out situations, verbal explanations, expressions, or equations.
K.OA.A.5 — Use mental strategies flexibly to develop fluency in addition and subtraction within 10.
K.CC.B.6 — Count to answer “how many?” questions about as many as 20 things arranged in a line, a rectangular array, a circle, or as many as 10 things in a scattered configuration. Given a number from 1-20, count out that many objects.

Texas

K.3A — model the action of joining to represent addition and the action of separating to represent subtraction;
K.3B — solve word problems using objects and drawings to find sums up to 10 and differences within 10; and
K.3C — explain the strategies used to solve problems involving adding and subtracting within 10 using spoken words, concrete and pictorial models, and number sentences.
K.2C — count a set of objects up to at least 20 and demonstrate that the last number said tells the number of objects in the set regardless of their arrangement or order;

Utah

K.OA.2 — Solve addition and subtraction word problems within 10. Use objects or drawings to represent the problem.
1.OA.5 — Relate counting to addition and subtraction. For example, by counting on 2 to add 2.
K.OA.1 — Represent addition and subtraction with objects, fingers, mental images, simple drawings, or sounds.For example, use clapping, act out situations, and use verbal explanations, expressions, or equations.
K.OA.5 — Fluently add and subtract using numbers within 5.
1.OA.6.b — By the end of Grade 1, demonstrate fluency for addition and subtraction within 10.

Vermont

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.5 — Fluently add and subtract within 5.

Virginia

K.CE.1 — The student will model and solve single-step contextual problems using addition and subtraction with whole numbers within 10. Students will demonstrate the following Knowledge and Skills:
K.CE.1f — Model and solve single-step contextual problems (join, separate, and part-part-whole) using 10 or fewer concrete objects.
1.CE.1f — Represent, solve, and justify solutions to single-step addition and subtraction problems (join, separate, and part-part-whole) within 20, including those in context, using words, objects, drawings, or numbers.
1.CE.1b — Demonstrate fluency with addition and subtraction within 10 by applying reasoning strategies (e.g., count on/count back, one more/one less, doubles, make ten).

Washington

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.5 — Fluently add and subtract within 5.

Washington, D.C.

K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.A.5 — Fluently add and subtract within 5.
1.OA.A.1 — Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

West Virginia

M.K.9 — Solve addition and subtraction word problems and add and subtract within 10 by using objects or drawings to represent the problem.
M.K.8 — Represent addition and subtraction with strategies using objects, fingers, mental images, drawings, sounds (e.g., claps), and acting out situations, verbal explanations, expressions, and equations.
M.K.12 — Fluently (efficiently, flexibly, and accurately) add and subtract within 5 using various strategies.

Wisconsin

M.K.OA.A.2 — Solve addition and subtraction word problems, and add and subtract within 10, e.g., by using objects or drawings to represent the problem.
M.K.OA.A.1 — Represent addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, or numbers. Drawings need not show details but should show the mathematics in the problem.
M.K.OA.A.5 — Flexibly and efficiently add and subtract within 5 using mental images and composing or decomposing numbers up to 5.

Wyoming

K.OA.D.1 — Model situations that involve representing addition and subtraction with objects, fingers, mental images, drawings, sounds (e.g., claps), acting out situations, verbal explanations, expressions, or equations.
K.OA.D.2 — Solve word problems using objects and drawings to find sums up to 10 and differences within 10.
K.CC.B.5.A — Answer the question "how many?" by counting up to 20 objects arranged in a line, a rectangular array, a circle, or as many as 10 objects in a scattered configuration.
K.OA.D — Understand addition as putting together and adding to, and understand subtraction as taking apart and taking from.
K.OA.D.5 — Fluently add and subtract within 5.