🔟 Number Bonds

What you’ll learn

1. Pairs That Make 5Find all the pairs that make 5, like 1 and 4, 2 and 3, 0 and 5.Number bonds are pairs of numbers that join to make a bigger number. Five has three pairs: 0 and 5, 1 and 4, 2 and 3 — and each pair works flipped around too. Your own hand shows them: fold fingers down and the up-and-down fingers always make 5.
2. Ten-Frame FriendsUse a ten-frame to find how many more a number needs to make 10.A ten-frame is a box with 2 rows of 5 spaces — 10 in all. Put in 7 counters and the 3 empty spaces show that 7 needs 3 more to make 10. Counting the empty spaces always reveals the missing partner.
3. Pairs That Make 10Instantly name the partner that makes 10 for any number from 1 to 9.The pairs that make 10 are superstar facts: 9 and 1, 8 and 2, 7 and 3, 6 and 4, 5 and 5. Your ten fingers are a built-in ten-frame — hold up 7 and the 3 folded fingers show the partner. Practice until the partner pops out fast!
4. Break Numbers ApartSplit numbers up to 10 into two parts in more than one way.Every number is a whole that can split into parts: 6 can be 4 and 2, or 3 and 3, or 5 and 1. The parts always snap back together to make the whole. Finding ALL the ways to split a number — like 4 into 0+4, 1+3, 2+2 — makes bigger math easier later.
5. Bonds to 20Use make-ten and fact families to recall bonds within 20, like 8 + 5 = 13 and 13 − 5 = 8.To solve 8 + 5, split the 5 into 2 and 3: then 8 + 2 = 10 and 10 + 3 = 13. The numbers 8, 5, and 13 form a fact family: 8 + 5 = 13, 5 + 8 = 13, 13 − 5 = 8, 13 − 8 = 5. Knowing one fact in the family unlocks all the others!

Questions this course answers

Grounded in trusted sources

• PBS Kids — early math
• Khan Academy Kids
• NAEYC — early math learning
• Britannica Kids

Every Wunder lesson is built from real, reputable sources — never invented.

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