Unit 8 - Lesson 15 - Grade 3: Illustrative Mathematics

Last updated 11 months ago

11 questions

Note from the author:

Grade 3 Unit
Lesson 15: Number Talk
CC BY 2021 Illustrative Mathematics®

Instructions

Grade 3 Unit
Lesson 15: Number Talk
CC BY 2021 Illustrative Mathematics®

Lesson: Number Talk

Cool Down: Number Talk Reflection

Unit 8 - Lesson 15 - Grade 3: Illustrative Mathematics

Last updated 11 months ago

11 questions

Note from the author:

Grade 3 Unit
Lesson 15: Number Talk
CC BY 2021 Illustrative Mathematics®

Instructions

Grade 3 Unit
Lesson 15: Number Talk
CC BY 2021 Illustrative Mathematics®

Lesson: Number Talk

Number Talk: Addition (Warm Up)

Find the value of each expression mentally.

300 + 400

300 + 437

321 + 437

425 + 514

Number Talk Design 1

Here are three subtraction expressions.
- 400
- 399
- 399

Think of at least two different ways to find the value of each difference mentally.

Write a fourth subtraction expression whose value can be found using one of the strategies you thought of.

Number Talk Design 2

Here are two addition expressions.
500 + 199
504 + 199

Think of at least two different ways to find the value of each sum mentally.

Write two more addition expressions whose values can be found using the strategies you thought of.

Number Talk Design 3

Write three subtraction expressions to complete the Number Talk.
900 - 400

Number Talk Design 4

Write four addition or subtraction expressions to create a Number Talk.

Cool Down: Number Talk Reflection

As mathematicians, we use patterns and things we see happening over and over again to help us reason about new problems. Describe a time today where you did that.

Unit 8 - Lesson 15 - Grade 3: Illustrative Mathematics

Unit 8 - Lesson 15 - Grade 3: Illustrative Mathematics

Number Talk: Addition (Warm Up)

300 + 400

300 + 437

321 + 437

425 + 514

Number Talk Design 1

Think of at least two different ways to find the value of each difference mentally.

Write a fourth subtraction expression whose value can be found using one of the strategies you thought of.

Number Talk Design 2

Think of at least two different ways to find the value of each sum mentally.

Write two more addition expressions whose values can be found using the strategies you thought of.

Number Talk Design 3

Write three subtraction expressions to complete the Number Talk.900 - 400

Number Talk Design 4

Write four addition or subtraction expressions to create a Number Talk.

As mathematicians, we use patterns and things we see happening over and over again to help us reason about new problems. Describe a time today where you did that.

Number Talk: Addition (Warm Up)

300 + 400

300 + 437

321 + 437

425 + 514

Number Talk Design 1

Think of at least two different ways to find the value of each difference mentally.

Write a fourth subtraction expression whose value can be found using one of the strategies you thought of.

Number Talk Design 2

Think of at least two different ways to find the value of each sum mentally.

Write two more addition expressions whose values can be found using the strategies you thought of.

Number Talk Design 3

Write three subtraction expressions to complete the Number Talk.900 - 400

Number Talk Design 4

Write four addition or subtraction expressions to create a Number Talk.

As mathematicians, we use patterns and things we see happening over and over again to help us reason about new problems. Describe a time today where you did that.

Write three subtraction expressions to complete the Number Talk.
900 - 400

Write three subtraction expressions to complete the Number Talk.
900 - 400