What is a number bond?
A number bond is a simple picture that shows how a number breaks into two parts. The whole goes in the top circle, and the two parts go in the circles below it, like 10 splitting into 6 and 4.
How you probably learned it
You probably memorized addition facts as a list: 6 + 4 = 10, 7 + 3 = 10, and so on. Each fact was its own thing to remember.
How your kid is learning it
Your kid sees all of those facts as one idea: 10 can be split into parts. If they know 6 and 4 make 10, they also know 10 − 6 = 4 and 10 − 4 = 6. One picture, four facts.
Why schools teach number bonds
Number bonds build the habit of seeing numbers as made of smaller pieces. That habit is what makes mental math fast later on. A kid who knows 8 is "5 and 3" can add 8 + 7 by thinking "8 needs 2 more to make 10, then 5 left over: 15."
How to help at home
- Hold up some fingers on both hands and ask: "How many on this hand? How many on that hand? How many altogether?"
- Hide some crackers under a cup. "We had 10. I see 6. How many are hiding?"
- Say the parts out loud: "7 and 3 make 10." Saying it builds the connection faster than writing it.
