Common Core Math
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Learning Goal

Part of: Use the four operations with whole numbers to solve problems — 2 of 3 cluster items

Multiply or divide to solve word problems involving multiplicative comparison

4.OA.A.2

**4.OA.A.2**: Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.

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4.OA.A.2: Multiply or divide to solve word problems involving multiplicative comparison, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem, distinguishing multiplicative comparison from additive comparison.

What you'll learn

  1. Identify the three quantities in a multiplicative comparison word problem (the larger quantity, the reference quantity, and the comparison factor) and determine which quantity is unknown
  2. Write a multiplication or division equation with a symbol for the unknown to represent a multiplicative comparison word problem
  3. Solve multiplicative comparison word problems in all three unknown positions: unknown product (larger quantity), unknown factor (comparison factor), and unknown group size (reference quantity)
  4. Distinguish a multiplicative comparison problem from an additive comparison problem and select the correct operation accordingly
  5. Assess the reasonableness of an answer by checking whether the result makes sense given the comparison type (e.g., "times as many" should produce a larger number when the product is unknown)

Slides

Interactive presentations perfect for visual learners • In development

Slides

In development

Not yet available • Check back soon!