# Operations & Algebraic Thinking - 3rd Grade Common Core Math

## 3.OA.1

Interpret products of whole numbers, e.g., interpret 5 Ă— 7 as the total number of objects in 5 groups of 7 objects each.

Multiply using Pictures

## 3.OA.2

Interpret whole-number quotients of whole numbers, e.g., interpret 56 Ă· 8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares, or as a number of shares when 56 objects are partitioned into equal shares of 8 objects each.

## 3.OA.3

Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

## 3.OA.4

Determine the unknown whole number in a multiplication or division equation relating three whole numbers.

Relate Division and Multiplication

## 3.OA.5

Apply properties of operations as strategies to multiply and divide.

## 3.OA.6

Understand division as an unknown-factor problem.

Relate Division and Multiplication

## 3.OA.7

Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division (e.g., knowing that 8 Ă— 5 = 40, one knows 40 Ă· 5 = 8) or properties of operations. By the end of Grade 3, know from memory all products of two one-digit numbers.

Multiply by 2

Multiply by 4

Multiply by 5

Multiply by 10

Multiply by 0 and 1

Multiply by 3

Multiply by 6

Multiply by 7

Multiply by 8

Multiply by 9

Divide by 2

Divide by 5

Divide by 10

Divide by 3

Divide by 4

Divide by 6

Divide by 7

Divide by 8

Divide by 9

## 3.OA.8

Solve two-step word problems using the four operations. Represent these problems using equations with a letter standing for the unknown quantity. Assess the reasonableness of answers using mental computation and estimation strategies including rounding.

## 3.OA.9

Identify arithmetic patterns (including patterns in the addition table or multiplication table), and explain them using properties of operations.