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Subtraction | Abacus - Class 1 PDF Download

Step of Subtraction

1. Subtract by doing the addition process in reverse

Subtraction | Abacus - Class 1Borrow digits from the previous column instead of carrying them over. Say you're subtracting 867 from 932. After entering 932 into the abacus, start subtracting column-by-column starting on your left.

  • Eight from nine is one, so you'll leave a single bead up in the hundreds place.
  • In the tens place, you can't subtract 6 from 3, so you'll borrow the 1 in the hundreds place (leaving it zero) and subtract 6 from 13, making it 7 in the tens place (the upper bead up and two lower beads).
  • Do the same thing in the ones place, "borrowing" a bead from the tens place (making it 6) to subtract 7 from 12 instead of 2.
  • There should be a 5 in the ones column: 932 - 867 = 65.
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