# Section C: Practice Problems Make and Break Apart 10

## Section Summary

Details

In this section, we found many different ways to make 10.

We used a 10-frame and our fingers to show numbers and figure out how many more are needed to make 10.

There are 4 counters.
We need 6 more counters to make 10.

There are 9 fingers.
We need to put up 1 more finger to make 10.

We used equations to show different ways to make 10.

## Problem 1 (Lesson 10)

How many counters are there?

## Problem 2 (Lesson 10)

Draw a line from the fingers to the ten-frame that shows the same number.

## Problem 3 (Lesson 11)

Circle the equation that matches the 10-frame.

## Problem 4 (Lesson 12)

Draw a line from each 10-frame to the equation it matches.

## Problem 5 (Lesson 12)

Write a number to show how many counters are needed to fill the 10-frame.

## Problem 6 (Lesson 13)

For each number, write the number you need to add to make 10.
Use a 10-frame and two-color counters if it helps you.

## Problem 7 (Lesson 14)

Mai has a tower of 10 connecting cubes.
She snaps the tower into 2 parts and puts one part behind her back.
She shows her partner 3 cubes.
How many cubes is Mai hiding?
Show your thinking using drawings, numbers, words, or objects.

## Problem 8 (Exploration)

Clare is playing What’s Behind My Back? She has a tower of 10 cubes.
She accidentally snaps the tower into 3 pieces.
She shows these two towers.

How many cubes does Clare have behind her back?

## Problem 9 (Exploration)

Diego is playing What’s Behind My Back? He has a tower of 10 cubes.
He accidentally snaps the tower into 3 pieces.
He shows this tower.

How many cubes could be in Diego’s other two towers?