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Unit 3 - Lesson 20 - Grade 5: Illustrative Mathematics

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11 Questions
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Grade 5 Unit 3
Lesson 20: How Much in the Group?
CC BY 2021 Illustrative Mathematics
Grade 5 Unit 3
Lesson 20: How Much in the Group?
CC BY 2021 Illustrative Mathematics
Lesson: How Much in the Group?

Estimation Exploration: What Number Goes in the Blank? (Warm Up)

1.

What number goes in the blank?


Record an estimate that is:

Different Equations

2.

If 1/3 of the class is 9 students, how many students are in the class?

Explain or show your reasoning.

3.

Explain how this equation represents the situation.

4.

Explain how this equation represents the situation.

5.

Explain how this equation represents the situation.

How Big is the Class?

Jada’s class has 24 students in it. That is 1/4 of the total students in the 5th grade.
6.

How many students are in the 5th grade? Explain or show your reasoning.

7.

Select all the equations that represent this situation.

How Many in One Group?

Solve each problem. Show or explain your reasoning.
8.

250 mg of calcium is 1/4 of the daily recommended allowance. What is the daily recommended allowance of calcium? Show or explain your reasoning.

9.

A rocket took 60 days to get 1/5 of the way to Mars. How many days did it take the rocket to get to Mars? Show or explain your reasoning.

Cool Down:Drive to School
10.

If 1/3 of the drive to Han’s school is 2 miles, how long is the whole drive to school?

Draw a diagram and explain your reasoning.

11.

If 1/3 of the drive to Han’s school is 2 miles, how long is the whole drive to school?

Write a division equation that represents this situation.