Log in
Sign up for FREE
arrow_back
Library

Unit 5 - Lesson 7 - Grade 5: Illustrative Mathematics

star
star
star
star
star
Last updated 11 months ago
14 questions
Note from the author:
Grade 5 Unit 5
Lesson 7: Round Doubloons
CC BY 2021 Illustrative Mathematics
Grade 5 Unit 5
Lesson 7: Round Doubloons
CC BY 2021 Illustrative Mathematics
Lesson: Round Doubloons
1
1
1
1
1
1
1
1
1
1
Cool Down: A Golden Dollar
1
1

Notice and Wonder: A Digital Scale (Warm Up)

1
Question 1
1.

What do you notice?

1
Question 2
2.

What do you wonder?

Gold Doubloons

Question 3
3.

  • Until 1728, doubloons weighed 6.867 grams.
  • After 1728, they weighed 6.766 grams.

You have a scale that measures weight to the
nearest tenth of a gram.


Was the doubloon on the scale made before or after 1728?

Question 4
4.

If you had a scale that measured to the nearest gram, explain why you would not be able to tell what year the doubloon was made based on the weight listed on the scale.

Question 5
5.

Which doubloons weigh more, the ones made before 1728 or the ones made after 1728? Explain or show your reasoning.

Question 6
6.

Show the weights of the doubloons on the number line.

Question 7
7.

Use the number line to find which hundredth of a gram the doubloon weights are each closest to.

Question 8
8.

Use the number line to find which hundredth of a gram the doubloon weights are each closest to.

Exact or Approximate?

Question 9
9.

Decide if the quantity is exact or an estimate. Be prepared to explain your reasoning.

There are 14 pencils on the desk.

Question 10
10.

Decide if the quantity is exact or an estimate. Be prepared to explain your reasoning.

The population of Los Angeles is 12,400,000.

Question 11
11.

Decide if the quantity is exact or an estimate. Be prepared to explain your reasoning.

It's 2.4 miles from the school to the park.

Question 12
12.

Decide if the quantity is exact or an estimate. Be prepared to explain your reasoning.

The runner finished the race in 19.78 seconds.

Question 13
13.

A one-dollar gold coin weighs 1.672 grams.

A scale reads to the nearest tenth of a gram. What will the scale give for the weight of
this coin?

Question 14
14.

A one-dollar gold coin weighs 1.672 grams.

A different scale reads to the nearest hundredth of a gram. What will the scale give for the weight of this coin?