Does your child get stuck on 100 – 35 or 200 – 78?

Borrowing across zeroes is a major hurdle. Abacus shows the chain of exchanges — 1 hundred becomes 10 tens, then 1 ten becomes 10 ones.

Here’s the promise: You’ll learn how abacus demystifies borrowing across zeroes.

🧩 Why Borrowing Across Zeroes is Hard

The rule “borrow from the next non-zero column” is abstract. Abacus makes each exchange physical: one hundred becomes ten tens, one ten becomes ten ones. The chain is visible.

🎯 How Abacus Teaches Borrowing Across Zeroes

For 100 – 35: Show 1 hundred bead. “Can we subtract 5 ones? No — borrow from tens? Tens is empty. So borrow from hundreds.” Exchange: remove 1 hundred, add 10 tens. Then borrow 1 ten, exchange for 10 ones. Now subtract. Practice: 200 – 68, 300 – 125, 1000 – 456. Act out each exchange with beads.

💡 A Parent’s Success

“My daughter cried over 100 – 37. We did the bead exchange 5 times. Now she says ‘Borrow from hundreds, then from tens, then subtract.’ She understands why, not just the rule.”

You might wonder, “Does this work for numbers with multiple zeroes?” Yes — 1000 – 273 requires multiple exchanges. Abacus handles it.

❓ FAQ — Borrowing with Zeroes