Unit 3 - Lesson 11 - Grade 3: Illustrative Mathematics
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Grade 3 Unit 3
Lesson 11: Analyze Subtraction Algorithms
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 3
Lesson 11: Analyze Subtraction Algorithms
CC BY 2021 Illustrative Mathematics®
Lesson: Analyze Subtraction Algorithms
Find the value of each expression mentally.
The first steps of two algorithms are shown.
Noah wanted to find the value of 301 - 167 and wrote:
Elena said that we can’t subtract this way because we would need more ones to subtract 7 ones, but there’s a zero in the tens place of 301.
Cool Down: Subtraction Reflection