See why we borrow: one ten becomes ten ones
Tap + and − to set the numbers. If there aren’t enough ones, press “Borrow a ten” — one ten breaks into ten ones — then take away.
Start with
52
Tens
Ones
Take away
27
Tens
Ones
Tens
5
Ones
2
We need to take away 7 ones but only have 2. Borrow 1 ten → it becomes 10 more ones.
🚀 Keep practising