Unit 5 - Lesson 17 - Grade 5: Illustrative Mathematics - Formative Library | Library

Instructions

Grade 5 Unit 5
Lesson 17: Multiply Decimals and Whole Numbers
CC BY 2021 Illustrative Mathematics

True or False: Place Value Products (Warm Up)

Decide if each statement is true or false. Be prepared to explain your reasoning.

1.

2.

Explain your reasoning.

3.

4.

Explain your reasoning.

5.

6.

Explain your reasoning.

Multiply Decimals By Whole Numbers

7.

Find the value of the expression in a way that makes sense to you. Explain or show your reasoning. Use the grids, if needed.

8.

Find the value of the expression in a way that makes sense to you. Explain or show your reasoning. Use the grids, if needed.

9.

Find the value of the expression in a way that makes sense to you. Explain or show your reasoning. Use the grids, if needed.

Using Whole Number Products

10.

Find the value of the expression. Explain or show your reasoning.

11.

Find the value of the expression. Explain or show your reasoning.

12.

Find the value of the expression. Explain or show your reasoning.

Kiran wrote this explanation to describe the strategy he used to multiply a whole number by some tenths:

“I just turn the numbers into whole numbers, multiply them, and call them tenths.” 

(Pause for teacher directions.)

13.

Can you use Kiran’s reasoning to find the value of 6 x 0.07? Explain your reasoning.

14.

Find the value of the expression. Explain or show your reasoning.

15.