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K-5 Grade 3 Unit 3 Lesson 4

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•K-5 Math 6-8 Math 9-12 Math

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Kindergarten Grade 1 Grade 2 •Grade 3 Grade 4 Grade 5

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Unit 1 Unit 2 •Unit 3 Unit 4 Unit 5 Unit 6 Unit 7 Unit 8

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Lesson 1 Lesson 2 Lesson 3 •Lesson 4 Lesson 5 Lesson 6 Lesson 7 Lesson 8 Lesson 9 Lesson 10 Lesson 11 Lesson 12 Lesson 13 Lesson 14 Lesson 15 Lesson 16 Lesson 17 Lesson 18 Lesson 19 Lesson 20 Lesson 21

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IM K-5 Math
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Lesson 4

Warm-up Activity 1 Activity 2

Unit 3, Lesson 4

Introduction to Addition Algorithms

Grade 3

Warm-up

Which 3 go together?

A.

B. 247

C.

D.

Activity 1

Three students found the value of . Their work is shown. Explain how each method works.

Tyler’s drawing
Lin’s method
Han’s method

Base ten blocks.

Activity 2

Try using an algorithm to find the value of each sum. Show your thinking. Organize it so it can be followed by others.