Step 1 of 4 · The strategy
Stack 4 digits. Subtract column-by-column, right to left. Borrow when needed.
If the top digit is smaller,
borrow
from the next column. If that column is
0
, the borrow chains further left.
Next
Step 2 of 4 · 4,321 − 1,876
4,321 − 1,876 =
2,445
Replay
Next
Step 3 of 4 · 5,000 − 2,345 (borrow chain!)
5,000 − 2,345 =
2,655
Replay
Practice
Step 4 of 4 · Your turn
Stack vertically and borrow as needed.
Next question
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