# Lesson Worksheet: Adding Three Numbers by Making 10 Mathematics • 1st Grade

In this worksheet, we will practice adding three one-digit numbers by first adding two of them to make 10.

Q1:

Answer the questions to find an easy way to add .

What is ? What is ?

What is ? Q2:

Daniel started putting counters into ten frames to help him add. Can you find the total?

Q3:

We can add three numbers in any order. Which of these is equal to the sum of 5, 9, and 1?

• A • B • C What is 5+9+1?

Q4:

Fill in the blank: .

Q5:

Add the numbers. Find the ten frames that show the sum.

• A • B • C Q6:

Add by making 10. Q7:

Scarlett started putting counters into ten frames to help her add. What is the total?

Q8:

Add the numbers. Hint: Can you find a way to make 10?

Q9:

Adding 3 numbers is easy when we can make 10!

To find we can make 10 by adding 8 and 2 first. What number is missing ? Q10:

Solve .

Hint: Make ten first.

This lesson includes 9 additional question variations for subscribers.

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