About Number Bonds
Free number bonds practice for kids — master addition pairs and part-whole relationships with interactive exercises. Builds math fluency for ages 4-8. No ads, no sign-up.
How to use
- Look at the target number and one of its parts.
- Figure out the missing part to complete the number bond.
- Type or select your answer and get instant feedback.
- Practice bonds to 10, then progress to bonds to 20!
Frequently asked questions
What are number bonds?
How a number splits into two parts (e.g., 7 = 3 + 4). Fundamental to mental math, taught in K-2 worldwide.
Why are they important?
Foundation for addition, subtraction, and mental math fluency. Makes advanced math easier later.
Is this free?
Completely free — no ads, no sign-up, runs in your browser.
Part of ToolFluency’s library of free online tools for Kids. No account needed, no data leaves your device.