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Unit 5 - Lesson 13 - Grade 5: Illustrative Mathematics
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Lesson: Analyze Addition Mistakes
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Cool Down: What is the Error?
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Grade 5 Unit 5
Lesson 13: Analyze Addition Mistakes
CC BY 2021 Illustrative Mathematics
Grade 5 Unit 5
Lesson 13: Analyze Addition Mistakes
CC BY 2021 Illustrative Mathematics
Estimation Exploration: Many Places (Warm Up)
Question 1
1.
1,987.89 + 658.54
Record an estimate that is:
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Compare Calculations
Question 2
2.
Find the value of 621.45 + 72.3. Explain or show your reasoning.
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Question 3
3.
Elena and Andre found the value of 621.45 + 72.3. Who do you agree with? Explain or show your reasoning.
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Same Digits, Different Sums
Question 4
4.
Find the value of the expression. Explain or show your reasoning.
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Question 5
5.
Find the value of the expression. Explain or show your reasoning.
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Question 6
6.
Find the value of the expression. Explain or show your reasoning.
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Question 7
7.
Find the value of the expression. Explain or show your reasoning.
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Question 8
8.
The calculation has an error.
Explain the error.
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Question 9
9.
Find the correct value of 38.7 + 9.46.
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