Printable · number bonds
Number Bonds Worksheets
Pick a total and print. Every sheet is generated fresh, with an answer key if you want one.
Part-whole bonds
Mixed bonds, whole or part missing
Make the total
Connect it to the game
Sheets build accuracy, and the game builds speed. After a sheet, try Bond Bridge and friends, or open the page for one total, like bonds of 10 or bonds of 20.
Questions
Which total should we start with?
Start with 5, then 10. Once the bonds of 10 are secure, totals from 6 to 9 come quickly, and the bonds of 20 follow from them.
What's the top circle on the diagram?
The whole. The two circles below are the parts. Read our number bonds guide for how to teach it.
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