**Posters listing the mental math strategies for addition, subtraction, multiplication, and division.**

Print and display in your classroom as a reference for students.

Check out these posters outlining the operation strategies in further detail:

teaching resource

**Posters listing the mental math strategies for addition, subtraction, multiplication, and division.**

Print and display in your classroom as a reference for students.

Check out these posters outlining the operation strategies in further detail:

#### CCSS.MATH.CONTENT.1.OA.C.6

Add and subtract within 20, demonstrating fluency for addition and subtraction within 10. Use strategies such as counting on; making ten (e.g., 8 + 6 = 8 + 2 + 4 = 10 + 4 = 14); decomposing a number leading to a ten (e.g., 13 - 4 = 13 - 3 - 1 = 10 - ...

#### CCSS.MATH.CONTENT.2.OA.B.2

Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.

#### CCSS.MATH.CONTENT.3.OA.C.7

Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division (e.g., knowing that 8 × 5 = 40, one knows 40 ÷ 5 = 8) or properties of operations. By the end of Grade 3, know from memory all pr...

#### CCSS.MATH.CONTENT.4.NBT.B.5

Multiply a whole number of up to four digits by a one-digit whole number, and multiply two two-digit numbers, using strategies based on place value and the properties of operations. Illustrate and explain the calculation by using equations, rectangul...

#### CCSS.MATH.CONTENT.4.NBT.B.6

Find whole-number quotients and remainders with up to four-digit dividends and one-digit divisors, using strategies based on place value, the properties of operations, and/or the relationship between multiplication and division. Illustrate and explai...

#### Math 1.3(D)

Apply basic fact strategies to add and subtract within 20, including making 10 and decomposing a number leading to a 10;

#### Math 1.3(E)

Explain strategies used to solve addition and subtraction problems up to 20 using spoken words, objects, pictorial models, and number sentences; and

#### Math 2.4(B)

Add up to four two-digit numbers and subtract two-digit numbers using mental strategies and algorithms based on knowledge of place value and properties of operations;

#### Math 2.4(C)

Solve one-step and multi-step word problems involving addition and subtraction within 1,000 using a variety of strategies based on place value, including algorithms; and

#### Math 3.4(A)

Solve with fluency one-step and two-step problems involving addition and subtraction within 1,000 using strategies based on place value, properties of operations, and the relationship between addition and subtraction;

#### Math 3.4(G)

Use strategies and algorithms, including the standard algorithm, to multiply a two-digit number by a one-digit number. Strategies may include mental math, partial products, and the commutative, associative, and distributive properties;

#### Math 3.4(K)

Solve one-step and two-step problems involving multiplication and division within 100 using strategies based on objects; pictorial models, including arrays, area models, and equal groups; properties of operations; or recall of facts.

#### Math 4.4(D)

Use strategies and algorithms, including the standard algorithm, to multiply up to a four-digit number by a one-digit number and to multiply a two-digit number by a two-digit number. Strategies may include mental math, partial products, a...

#### Math 4.4(F)

Use strategies and algorithms, including the standard algorithm, to divide up to a four-digit dividend by a one-digit divisor;

#### Math 5.3(C)

Solve with proficiency for quotients of up to a four-digit dividend by a two-digit divisor using strategies and the standard algorithm;

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### Multi-Step Problem Solving Worksheet

Solve a multi-step problem and explain the mathematical reasoning behind the process with this simple worksheet.

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### Addition Strategies: Using Doubles Worksheet

Practice the “using doubles” addition strategy to solve addition problems to 20.

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### 2-digit + 1-digit Task Cards

Practice adding 2-digit and 1-digit numbers with this set of 18 number sentence task cards.

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### Counting On: Addition Strategy Worksheet

Practice the “counting on” addition strategy to solve addition problems to 20.

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### Adding 2-Digit Numbers Task Cards

Practice adding 2-digit numbers with this set of 18 number sentence task cards.

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### Adding Four 2-Digit Numbers Task Cards

Practice adding four 2-digit numbers together with this set of 16 task cards.

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### 2-Digit + 1-Digit Numbers Addition Worksheet

Practice addition involving 2- and 1-digit numbers with this drill and practice worksheet.

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### Addition and Subtraction Problem Solving Task Cards

Practice solving 1- and 2-step word problems by adding and subtracting 2-digit numbers with this set of 16 task cards.

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### Double Dinos - Using Doubles Facts to Add Near Doubles Worksheet

Practice the “near doubles” addition strategy to solve addition problems to 20.

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### Cover Up! - Addition Facts Game

Develop a love of addition facts with this multiplayer Valentine’s Day board game.

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