Worksheet: Adding Three Numbers

In this worksheet, we will practice adding three 1-digit numbers by adding in any order and using strategies like making ten or using doubles.

Q1:

Complete the following: 1+5+4=.

  • A10
  • B9
  • C2
  • D0

Q2:

Find the three numbers from 4, 1, 7, 9, and 2 whose sum is 10.

  • A7, 2, 1
  • B4, 2, 1
  • C4, 2, 9
  • D7, 2, 9

Q3:

3 + 5 + 1 = .

Q4:

Jennifer was cleaning out her closet. She had 6 shirts, some dresses, and 4 pairs of pants.

If she had 13 pieces of clothing altogether, which of the following is the correct addition sentence?

  • A
  • B

How many dresses did she have?

Q5:

There are 9 baskets with 10 apples in each and 5 more apples in a tree. How many apples are there all together?

Q6:

Complete the following: 0+2+8=.

  • A10
  • B2
  • C6
  • D4

Q7:

Find the missing number in 16+3+1=+1.

Using that 16+3+1=19+1, what is 16+3+1?

Q8:

Benjamin had 5 chocolate bars, 4 lollipops, and 3 gummy bears.

In total, he had 5+4+3 candies.

Find another way to write the total number of candies.

  • A 5 + 8
  • B 5 + 7
  • C 4 + 6
  • D 4 + 4 + 3
  • E 4 + 7

Q9:

Find the missing number in 13+4+7=+7.

Q10:

We will see how we can write 4+6+3 in different ways.

Find the missing number.

Find the missing number.

Complete the missing sum.

  • A7, 3
  • B7, 6
  • C4, 9
  • D11, 3
  • E4, 8

All of these sums are equal. What are they equal to?

Q11:

Hannah has 20 counters.

Use the counters to find the missing number.

Q12:

When we add three numbers, we can first add any two of them.

For example, to find 8+6+7, we could first add 8 and 6 to get 14 as the picture shows.

Now, can you find the missing number?

Q13:

Am I using the equal sign correctly? Check if the two sums are equal.

  • Ayes
  • Bno

Q14:

Am I using the equal sign correctly? Check if the two sums are equal.

  • Ano
  • Byes

Q15:

Is the equal sign used correctly? Check if the two sums are equal.

  • ANo
  • BYes

Q16:

Complete the following: 3+0+0+5=.

Q17:

Check if the equal sign has been used correctly in 5+3+6=8+9. Are the two sums equal?

  • ANo
  • BYes

Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.