1
What do you notice?
What do you notice?
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What do you wonder?
What do you wonder?
Grade 3 Unit 3
Lesson 10: Subtraction Algorithms (Part 3)
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 3
Lesson 10: Subtraction Algorithms (Part 3)
CC BY 2021 Illustrative Mathematics®
What do you notice?
What do you wonder?
Andre and Clare found the value of 528 - 271. How they started their work is shown.
Complete Andre's algorithm to find the diffference.
Complete Clare's algorithm to find the diffference.
Andre and Clare started their subtraction in different ways. How did their way of starting affect the steps
needed to find the difference?
Clare used an algorithm to find the value of 538 - 156.
Try using her algorithm to find the value of each difference.
691 - 358
926 - 584
317 - 182
Use an algorithm of your choice to find the value of 419 - 267.
492 - 325
