Number bonds help children see how two smaller numbers can join to make one whole number. For this poster, the whole number is 10, and each pair of parts shows a different way to make 10. Learning these pairs builds strong mental math skills for addition and subtraction.
It also helps students recognize patterns quickly instead of counting every time.
Key Facts
- A number bond has a whole and two parts.
- For number bonds to 10, the whole is always 10.
- 1 + 9 = 10
- 2 + 8 = 10
- 3 + 7 = 10
- 4 + 6 = 10 and 5 + 5 = 10
Vocabulary
- Number bond
- A number bond is a picture that shows how parts join together to make a whole.
- Whole
- The whole is the total number made when the parts are added together.
- Part
- A part is one of the smaller numbers that makes up the whole.
- Ten-frame
- A ten-frame is a box with 10 spaces used to show numbers and number pairs clearly.
- Pair
- A pair is two numbers that go together, such as 4 and 6.
Common Mistakes to Avoid
- Mixing up the whole and the parts. The whole is 10, and the parts are the two numbers that add to 10.
- Counting only one part and forgetting the other part. Both parts must be added together to check that they make 10.
- Writing pairs that are close to 10 but do not equal 10. For example, 3 + 6 = 9, so it is not a number bond to 10.
- Thinking 2 + 8 and 8 + 2 are different totals. They use the same two parts and both make 10.
Practice Questions
- 1 Fill in the missing part: 4 + __ = 10.
- 2 A ten-frame has 7 red dots. How many blue dots are needed to fill all 10 spaces?
- 3 Explain why 6 and 4 make a number bond to 10, and describe how you could show it with two colors in a ten-frame.