Unit 3 - Lesson 10 - Grade 3: Illustrative Mathematics

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10 questions

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Grade 3 Unit 3
Lesson 10: Subtraction Algorithms (Part 3)
CC BY 2021 Illustrative Mathematics®

Instructions

Grade 3 Unit 3
Lesson 10: Subtraction Algorithms (Part 3)
CC BY 2021 Illustrative Mathematics®

Lesson: Subtraction Algorithms (Part 3)

Notice and Wonder: Digits that Disappear (Warm Up)

What do you notice?

What do you wonder?

A New Subtraction Algorithm

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.

Try Clare’s Algorithm

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

Cool Down: Choose the Method

Unit 3 - Lesson 10 - Grade 3: Illustrative Mathematics

Unit 3 - Lesson 10 - Grade 3: Illustrative Mathematics

Notice and Wonder: Digits that Disappear (Warm Up)

What do you notice?

What do you wonder?

A New Subtraction Algorithm

Complete Andre's algorithm to find the diffference.

Complete Clare's algorithm to find the diffference.

Try Clare’s Algorithm

691 - 358

926 - 584

Use an algorithm of your choice to find the value of 419 - 267.

Notice and Wonder: Digits that Disappear (Warm Up)

What do you notice?

What do you wonder?

A New Subtraction Algorithm

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?

Try Clare’s Algorithm

691 - 358

926 - 584

317 - 182

492 - 325

Use an algorithm of your choice to find the value of 419 - 267.

Andre and Clare started their subtraction in different ways. How did their way of starting affect the steps
needed to find the difference?

317 - 182

492 - 325

Unit 3 - Lesson 10 - Grade 3: Illustrative Mathematics

Unit 3 - Lesson 10 - Grade 3: Illustrative Mathematics

Notice and Wonder: Digits that Disappear (Warm Up)

What do you notice?

What do you wonder?

A New Subtraction Algorithm

Complete Andre's algorithm to find the diffference.

Complete Clare's algorithm to find the diffference.

Try Clare’s Algorithm

691 - 358

926 - 584

Use an algorithm of your choice to find the value of 419 - 267.

Notice and Wonder: Digits that Disappear (Warm Up)

What do you notice?

What do you wonder?

A New Subtraction Algorithm

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 stepsneeded to find the difference?

Try Clare’s Algorithm

691 - 358

926 - 584

317 - 182

492 - 325

Use an algorithm of your choice to find the value of 419 - 267.

Andre and Clare started their subtraction in different ways. How did their way of starting affect the stepsneeded to find the difference?

317 - 182

492 - 325

Andre and Clare started their subtraction in different ways. How did their way of starting affect the steps
needed to find the difference?

Andre and Clare started their subtraction in different ways. How did their way of starting affect the steps
needed to find the difference?