Third Grade Operations and Algebraic Thinking

Fluently multiply and divide within 100, find unknowns, apply properties of operations and answer word problems.  Just click on the blue links to display or print pdfs.
Standards

Practice Pages
Represent and solve problems involving multiplication and division - Cluster 1

Standard 3.OA.1:  Interpret products of whole numbers, e.g., interpret 5 x 7 as the total number of objects in 5 groups of 7 objects each.

Multiply Objects

Answers 3.OA.1.a


Multiply Objects

Answers 3.OA.1.b
Standard 3.OA.2:  Interpret whole-number quotients of whole numbers, e.g. interpret 56/8 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.

Divide Objects

Answers 3.OA.2.a


Divide Objects

Answers 3.OA.2.b

Standard 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.

Multiply Objects

Answers 3.OA.3.a

Division Sentences

Answers 3.OA.3.b

Standard 3.OA.4:  Determine the unknown whole number in a multiplication or division equation relating three whole numbers.
Multiplication

Answers 3.OA.4.a


Multiplication Unknowns

Answers 3.OA.4.b
Understand properties of multiplication and the relationship between multiplication and division - Cluster 2

Standard 3.OA.5:  Apply properties of operations as strategies to multiply and divide.



Commutative Multiplication

Answers 3.OA.5.a

Inverse Property

Answers 3.OA.5.b

Standard 3.OA.6:  Understand division as an unknown-factor problem.
Multiplication

Answers 3.OA.6.a

Missing Factors

Answers 3.OA.6.b

Multiply and divide within 100 - Cluster 3

Standard 3.OA.7:  Fluently multiply and divide within 100 using strategies such as the relationship between multiplication and division (e.g. knowing that 8 x 5 = 40, one knows 40/5 = 8) or properties of operations.  By the end of Grade 3, know from memory all products of two one-digit numbers.

Multiply/Divide

Answers 3.OA.7.a


Multiply/Divide

Answers 3.OA.7.b

Solve problems involving the four operations, and identify and explain patterns in arithmetic - Cluster 4

Standard 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 computations and estimation strategies including rounding.
Rounding

Answers 3.OA.8.a


3 part word problems

Answers 3.OA.8.b

Standard 3.OA.9:  Identify arithmetic patterns (including patterns in the addition table or multiplication table), and explain them using properties of operations.
Addition Input/Output

Answers 3.OA.9.a


Multiply Input/Output

Answers 3.OA.9.b