Unit 3 - Lesson 8 - Grade 3: Illustrative Mathematics

Last updated over 1 year ago

9 Nsɛmmisa

Hyɛ no nsow a efi ɔkyerɛwfo no hɔ:

Grade 3 Unit 3

Lesson 8: Subtraction Algorithms (Part 1)

CC BY 2021 Illustrative Mathematics®

Akwankyerɛ

Grade 3 Unit 3

Lesson 8: Subtraction Algorithms (Part 1)

CC BY 2021 Illustrative Mathematics®

Lesson: Subtraction Algorithms (Part 1)

Number Talk: Subtraction Strategies (Warm Up)

From Drawings to an Algorithm

Card Sort: Diagrams and Algorithms

Your teacher will give you a set of cards. Match each diagram with an algorithm.

Cool Down: Connect a Diagram and an Algorithm

Unit 3 - Lesson 8 - Grade 3: Illustrative Mathematics

Last updated over 1 year ago

9 Nsɛmmisa

Hyɛ no nsow a efi ɔkyerɛwfo no hɔ:

Grade 3 Unit 3

Lesson 8: Subtraction Algorithms (Part 1)

CC BY 2021 Illustrative Mathematics®

Akwankyerɛ

Grade 3 Unit 3

Lesson 8: Subtraction Algorithms (Part 1)

CC BY 2021 Illustrative Mathematics®

Lesson: Subtraction Algorithms (Part 1)

Number Talk: Subtraction Strategies (Warm Up)

Find the value of each expression mentally.

100 - 98

101 - 99

200 - 98

204 - 98

From Drawings to an Algorithm

Jada and Kiran found the value of 391 - 215. Their work is shown.

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Explain how Kiran’s algorithm starts.

Explain how Kiran recorded the decomposition of the ten into more ones.

Finish Kiran’s work.

Card Sort: Diagrams and Algorithms

Your teacher will give you a set of cards. Match each diagram with an algorithm.

Match each diagram with an algorithm.

Draggable item		Corresponding Item

Cool Down: Connect a Diagram and an Algorithm

Unit 3 - Lesson 8 - Grade 3: Illustrative Mathematics

Number Talk: Subtraction Strategies (Warm Up)

From Drawings to an Algorithm

Card Sort: Diagrams and Algorithms

Unit 3 - Lesson 8 - Grade 3: Illustrative Mathematics

Number Talk: Subtraction Strategies (Warm Up)

100 - 98

101 - 99

200 - 98

204 - 98

From Drawings to an Algorithm

Explain how Kiran’s algorithm starts.

Explain how Kiran recorded the decomposition of the ten into more ones.

Finish Kiran’s work.

Card Sort: Diagrams and Algorithms

Match each diagram with an algorithm.

Explain how the diagram matches the algorithm.

100 - 98

101 - 99

200 - 98

204 - 98

Explain how Kiran’s algorithm starts.

Explain how Kiran recorded the decomposition of the ten into more ones.

Finish Kiran’s work.

Match each diagram with an algorithm.

Explain how the diagram matches the algorithm.