Operations and Algebraic Thinking

Solve problems involving the four operations, and identify and explain patterns in arithmetic.
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.8 Task 1: Earning Money
3.OA.8 Task 2: Packs of Juice Boxes
3.OA.8 Task 3: Trip to Amusement Park
3.OA.8 Task 4: Soccer Uniform
3.OA.8 Task 5: Box Tops

3.OA.9 Identify arithmetic patterns (including patterns in the addition table or multiplication table), and explain them using properties of operations. For example, observe that 4 times a number is always even, and explain why 4 times a number can be decomposed into two equal addends.
3.OA.9 Task 1: Patterns in a Table
3.OA.9 Task 2: Packs of Juice Boxes