Unit 5 - Lesson 7 - Grade 5: Illustrative Mathematics
By Formative Library
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14 questions
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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
Notice and Wonder: A Digital Scale (Warm Up)
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Question 1
1.
What do you notice?
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Question 2
2.
What do you wonder?
Gold Doubloons
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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?
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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.
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Question 5
5.
Which doubloons weigh more, the ones made before 1728 or the ones made after 1728? Explain or show your reasoning.
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Question 6
6.
Show the weights of the doubloons on the number line.
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Question 7
7.
Use the number line to find which hundredth of a gram the doubloon weights are each closest to.
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Question 8
8.
Use the number line to find which hundredth of a gram the doubloon weights are each closest to.
Exact or Approximate?
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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.
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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.
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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.
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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.
Cool Down: A Golden Dollar
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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?
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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?