Number bonds practice › To 20
Number bonds to 20
Find the number that makes 20. How long a streak can you build?
All the bonds to 20
Make ten, carry the rest, as a game
Number Beasts: Bond Lab is a turn-based number puzzle where the number is the projectile. Make exactly 10 and a beast pops; overshoot and the leftover keeps flying into the next one. It’s number bonds you have to plan, not just recite.
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What are number bonds to 20?
Pairs of numbers that add up to 20: 0 + 20, 1 + 19, 2 + 18, 3 + 17, 4 + 16, 5 + 15, 6 + 14, 7 + 13 and so on.
Why do number bonds to 20 matter?
They make mental math fast. A child who knows 7 + 3 = 10 can quickly see that 27 + 3 = 30, and that 8 + 5 is 8 + 2 + 3 = 13 ("make ten, carry the rest").
How can kids practice number bonds?
Little and often: a few minutes of quick-fire questions, plus a printed worksheet now and then. The game above saves your best streak so kids can try to beat it.
Number Beasts: Bond Lab
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