Does your child know that 7 can be 3+4 but also 5+2?

Number bonds are pairs of numbers that add to a total. Abacus makes these relationships visual and memorable.

Here’s the promise: You’ll learn how abacus builds automatic number bond recognition.

🧩 What are Number Bonds?

Number bonds show how a number can be split into parts. For 10, bonds include 1+9, 2+8, 3+7, 4+6, 5+5. Knowing bonds makes addition and subtraction automatic.

🎯 How Abacus Teaches Number Bonds

Bead grouping: “Show me 6 as 5+1 and as 4+2.” Missing part: “I have 5 beads. How many more to make 9?” Fact families: 2+3=5, 3+2=5, 5-2=3, 5-3=2. Daily drill: 30 seconds of bond recall.

💡 A Parent’s Success

“My son used to count on fingers for 7+8. Now he says ‘7 needs 3 to make 10, take 3 from 8, leaves 5 — 15.’ That’s number bonds in action.”

You might wonder, “What’s the most important bond to learn?” Bonds to 10 are the most used in mental math.

❓ FAQ — Number Bonds