Step 1 of 4 · The strategy
Stack the numbers. Subtract column-by-column, right to left. Borrow when needed.
Start from the
ones
. If the top digit is smaller,
borrow
from the next column to the left.
Next
Step 2 of 4 · 247 − 138
247 − 138 =
109
Replay
Next
Step 3 of 4 · 602 − 149 (borrow chain!)
602 − 149 =
453
Replay
Practice
Step 4 of 4 · Your turn
Pick the answer.
Next question
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