Unit 3 - Lesson 12 - Grade 3: Illustrative Mathematics

Last updated about 1 year ago

26 questions

Note from the author:

Instructions

Lesson: Subtract Strategically

Cool Down: An Algorithm or Another Strategy?

Unit 3 - Lesson 12 - Grade 3: Illustrative Mathematics

Last updated about 1 year ago

26 questions

Note from the author:

Grade 3 Unit 3
Lesson 12: Subtract Strategically
CC BY 2021 Illustrative Mathematics®

Instructions

Grade 3 Unit 3
Lesson 12: Subtract Strategically
CC BY 2021 Illustrative Mathematics®

Lesson: Subtract Strategically

Number Talk: Threes (Warm Up)

Find the value of each expression mentally.

2 x 6

3 x 6

2 x 7

How Would You Subtract?

Use a strategy or algorithm of your choice to find the value of each difference. 
Show your reasoning. Organize it so it can be followed by others.

451 - 329

Greatest Difference, Smallest Difference

Directions:
Decide with your partner whether you will try to make the greatest difference or smallest difference.
Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.
Find the difference.
Compare your values.
Write a comparison using >, <, or =.
Play again.

Round 1

We will make the __________ difference.

Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.

Round 2

We will make the __________ difference.

Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.

Round 3

We will make the __________ difference.

Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.

Round 4

We will make the __________ difference.

Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.

Cool Down: An Algorithm or Another Strategy?

Unit 3 - Lesson 12 - Grade 3: Illustrative Mathematics

Unit 3 - Lesson 12 - Grade 3: Illustrative Mathematics

Number Talk: Threes (Warm Up)

2 x 6

3 x 6

2 x 7

How Would You Subtract?

451 - 329

Greatest Difference, Smallest Difference

Round 1

Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.

Round 2

Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.

Round 3

Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.

Round 4

Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.

How would you find the value of 700 - 599? Explain your reasoning.

Number Talk: Threes (Warm Up)

2 x 6

3 x 6

2 x 7

3 x 7

How Would You Subtract?

451 - 329

382 - 190

924 - 285

600 - 478

505 - 417

Greatest Difference, Smallest Difference

Round 1

Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.

Find the difference.

Round 2

Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.

Find the difference.

Round 3

Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.

Find the difference.

Round 4

Take turns spinning and recording a digit in the hundreds, tens, or ones place. Continue until your numbers are complete.

Find the difference.

How would you find the value of 700 - 599? Explain your reasoning.

3 x 7

382 - 190

924 - 285

600 - 478

505 - 417

Find the difference.

Find the difference.

Find the difference.

Find the difference.