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Worksheet: Addition of Three Numbers within 20 by Making Ten

Q1:

Answer the questions to find an easy way to add 6 + 7 + 3 .

What is 7 + 3 ?

What is 6 + 1 0 ?

What is 6 + 7 + 3 ?

Q2:

Michael 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: 6 + + 3 = 6 + 1 0 6 .

Q5:

Adding 3 numbers is easy when we can make 10!

To find 8 + 7 + 2 we can make 10 by adding 8 and 2 first.

What number is missing ?

Q6:

Add the numbers.

Find the ten frames that show the sum.

  • A
  • B
  • C

Q7:

Add by making 10.

Q8:

Hannah started putting counters into ten frames to help her add.

What is the total?

Q9:

Add the numbers.

Hint: Can you find a way to make 10?