operations · Foundation · AC9MFN04
Number bonds to ten
Ten can be split into two parts. When one part is shown, the missing part is the empty spaces in a ten-frame. Knowing the pairs that make ten also answers subtraction: if 7 and 3 make 10, then 10 − 3 = 7 and 10 − 7 = 3.
Sample questions
2 + ? = 10
- 2 boxes are filled. The missing part is the empty boxes.
- Count the empty boxes: there are 8.
- 2 + 8 = 10.
Answer: 8
9 + ? = 10
- 9 boxes are filled. The missing part is the empty boxes.
- Count the empty boxes: there is 1.
- 9 + 1 = 10.
Answer: 1
6 + ? = 10
- 6 boxes are filled. The missing part is the empty boxes.
- Count the empty boxes: there are 4.
- 6 + 4 = 10.
Answer: 4