Subtraction — Money Algorithm (Step-by-step)

(a) Subtract $20.90 from $31.60.

Click Next Step to subtract from the lowest place value to the highest. If a place can subtract, subtract immediately. If not, borrow 1 from the next left column (value ×10), then subtract.
Rule: the ones digit of cents is always 0 or 5.
Rule: the ones digit of cents is always 0 or 5.

$31.60 − $20.90 = ?

Click Next Step

Teaching Panel

Rename → Subtract

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STEP 1

Subtract the ones of cents.

? = ?

🧒 Child Try-It Panel

Try: $31.60 − $20.90

Your answer

Amount A (0–999.95)

Amount B (0–999.95)

Random range

Rename focus (for Random)

Tip: Start from the lowest place. If you can subtract, subtract immediately. If not, borrow 1 from the next left column (×10), then subtract.