Number bonds game
Free Number Bonds Game
Practice the pairs that make 10 and 20. Each round locks the whole game to the total you choose.
Number bonds to 10
Free to play · no signup · works on phones, tablets and computers
Why bonds to 10 come first
Ten is the number everything else leans on. A child who knows that 7 and 3 make 10 can do 7 + 5 by going through 10, can do 13 − 8 the same way, and later can work with 70 + 30. There are only six pairs to learn, counting 0 + 10.
Read what number bonds are for the picture and how to teach it, or print number bond sheets.
Quick quiz: bonds to 10
Number bonds game FAQ
What are number bonds to 10?
0 and 10, 1 and 9, 2 and 8, 3 and 7, 4 and 6, 5 and 5. Each pair also works turned around.
What age are number bonds for?
Usually ages 5 to 7. Younger children can start with bonds to 5.
Is Sumtown really free?
Yes. The whole game plays free in your browser, with no signup, no ads and no time limit. All fourteen mini games are in it. An iPhone app is on its way, and you can read what it will add.
An app is on its way
We're building a Sumtown app for iPhone with the parts that need a real app: offline play for car rides, a town map that remembers how far your child got, and a parent report on every fact. Until then, the whole game is free right here.
Coming soon on theApp Store