5.NF.5 Understanding Multiplication as Scaling

Task 1

Gisele incorrectly believes that 25 < ⅓ x 25.

What does the Gisele misunderstand about multiplication? Use pictures, numbers, and/or words to explain.

Task 2

 Ms. Fields’ class was given the following equation and asked to reason about the size of the product.

 1/3 x 5/2

 Alejandro reasons that the product will be less than the factors.

 What does Alejandro misunderstand about multiplication?

Scoring Rubric Task 1

Score 1

Student responses includes the following element.

●      Reasoning Component = 1 point

○      The student provides a valid explanation of Gisele’s error.

Score 0

Student response is incorrect or irrelevant.

Scoring Rubric Task 2

Score 1

Student responses includes the following element.

●      Reasoning Component = 1 point

○      The student provides a valid explanation of Alejandro’s error.

Score 0

Student response is incorrect or irrelevant.