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Unit 5 - Lesson 15 - Grade 5: Illustrative Mathematics

Last updated 9 months ago

14 questions

Note from the author:

Grade 5 Unit 5
Lesson 15: Estimate and Subtract
CC BY 2021 Illustrative Mathematics®

Instructions

Grade 5 Unit 5
Lesson 15: Estimate and Subtract
CC BY 2021 Illustrative Mathematics®

Lesson: Estimate and Subtract

Number Talk: One and Five Tenths (Warm Up)

Find the value of each expression mentally.

1

1

1

1

Revisit the Algorithm

1

Find the value of 8.53 - 2.7. Show your reasoning.

1

Han used the standard algorithm to subtract decimals. This is Han’s work. Describe what Han did in each step.

1

Use the standard algorithm to find the value of 6.62 - 3.71.

Estimate and Subtract

1

Which whole number is the difference 15.27 - 4.3 closest to? Explain or show your reasoning.

1

What is the value of 15.27 - 4.3? Explain or show your reasoning.

1

Which whole number is the difference 16.14 - 9.8 closest to? Explain or show your reasoning.

1

What is the value of 16.14 - 9.8? Explain or show your reasoning.

Compare Calculations to Evaluate a Difference (Optional)

1

Find the value of 622.35 - 71.4. Explain or show your reasoning.

1

Elena and Andre found the value of 622.35 - 71.4. Who do you agree with? Explain or show your reasoning.

Cool Down: Subtract Decimals

1

Find the value of 321.87 - 20.4. Explain or show your reasoning.