3-12 Subtracting a Group

Presentation

•

Mathematics

•

3rd Grade

•

Easy

Stephanie Compton

Used 4+ times

FREE Resource

8 Slides • 14 Questions

3-12 Subtracting a Group

Fill in the Blanks

$2\times5=?$

Type answer...

Fill in the Blanks

$2\times6=?$

Type answer...

Fill in the Blanks

$2\times7=?$

Type answer...

Fill in the Blanks

$10\times3=?$

Type answer...

Fill in the Blanks

$10\times4=?$

Type answer...

Fill in the Blanks

$10\times5=?$

Type answer...

Fill in the Blanks

$4\times5=?$

Type answer...

Fill in the Blanks

$5\times5=?$

Type answer...

Fill in the Blanks

$6\times5=?$

Type answer...

Math Message

Make an array on your whiteboard for the following question: There are 5 rows of 4 chairs for a class show. Write a number model for the total number of chairs.
Change your sketch to fit this situation: 4 people are not coming, so you need 4 fewer chairs. Write a number model that shows the new total number of chairs.

Fill in the Blanks

How many chairs are in your new array?

Type answer...

Solve

Danielle has 10 toy tricycles that each have 3 wheels. How many wheels are there all together?

Fill in the Blanks

What is the number model to go with Danielle's story?

Type answer...

Danielle lost 1 tricycle.

How many total wheels are there now?

Fill in the Blanks

How many total wheels are there after Danielle loses a tricycle?

Type answer...

Solve #1 on Math Journal Page 93

Multiple Choice

What helper fact does your first sketch show on #1?

$4\times9=36$

$4\times10=40$

Solve #2 on Math Journal Page 94

Open Ended

If you wanted to solve

4\times8

using the subtracting-a-group strategy

Type response here

3-12 Subtracting a Group

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