Complements of Numbers Worksheet for 8-Year-Olds (Grade 3) — Printable Math Practice

Free worksheet covering multiple subjects for age 8 students. Created with Learning Corner's AI-powered tools.

Get personalized worksheets for your own interests and needs

Try Worksheets Now
PDF

Instructions

Let's find the missing number friends! These special numbers are called complements. They pair up to make a nice, round number like 10, 20, or 100. See if you can help them find their partners!

Part 1: Rainbow Pairs to 10

These numbers want to make a perfect 10. Fill in the blank to complete the pair!

1.   6 +   = 10
2.   2 +   = 10
3.   9 +   = 10
4.   5 +   = 10
5.   7 +   = 10

Part 2: Building Up to 20

Now let's aim for a bigger number! Fill in the missing number to make 20.

1.   15 +   = 20
2.   11 +   = 20
3.   18 +   = 20
4.   4 +   = 20
5.   13 +   = 20

Part 3: The 100 Gold Coins Challenge!

You have bags of gold coins, but you need exactly 100 in each bag. How many more coins do you need to add?

1.   30 +   = 100
2.   80 +   = 100
3.   50 +   = 100
4.   65 +   = 100
5.   25 +   = 100

Part 4: Story Problems

Use your number complement skills to solve these puzzles!

1. Aisha is collecting 20 seashells. She has already found 12. How many more seashells does she need to find?

Answer:   seashells

2. A farmer wants to plant 100 corn seeds. He planted 70 seeds in the morning. How many seeds does he have left to plant?

Answer:   seeds

Answer Key

Part 1: Rainbow Pairs to 10

  1. 4
  2. 8
  3. 1
  4. 5
  5. 3

Part 2: Building Up to 20

  1. 5
  2. 9
  3. 2
  4. 16
  5. 7

Part 3: The 100 Gold Coins Challenge!

  1. 70
  2. 20
  3. 50
  4. 35
  5. 75

Part 4: Story Problems

  1. 8
  2. 30
With Worksheets, you can:
  • Reinforce key concepts
  • Provide hands-on practice
  • Customize exercises to fit your needs
  • Track your student's improvement
Try Worksheets Now