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Unit 4 - Lesson 5 - Grade 5: Illustrative Mathematics
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Instructions
Lesson: Standard Algorithm: Multi-digit Numbers
Cool Down: Standard Algorithm without Composition of a New Unit
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Grade 5 Unit 4
Lesson 5: Standard Algorithm: Multi-digit Numbers
CC BY 2021 Illustrative Mathematics®
Grade 5 Unit 4
Lesson 5: Standard Algorithm: Multi-digit Numbers
CC BY 2021 Illustrative Mathematics®
Number Talk: Partial Products (Warm Up)
Find the value of each product mentally.
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Compare Two Algorithms
Two algorithms for finding the value of 413 x 21 are shown.
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Use the Standard Algorithm
Use the standard algorithm to find the value of each expression.
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Question 12
12.
Use the standard algorithm to find the value of 203 x 23.
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Question 1
1.
Question 2
2.
Question 3
3.
Question 4
4.
Question 5
5.
How are the two algorithms the same? How are they different?
Question 6
6.
Explain or show where you see each step from the first algorithm in the second algorithm.
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Question 7
7.
How do the final steps in the two algorithms compare?
Question 8
8.
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Question 9
9.
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Question 10
10.
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Question 11
11.
Diego found the value of 301 x 24. Here is his work. Why doesn’t Diego’s answer make sense?