Key Idea1 of 3
The Tricky Zero
In 503 - 247, you need to borrow from the tens for the ones, but the tens digit is 0! First borrow from the hundreds: 5 becomes 4, 0 becomes 10. Then borrow from the new 10: 10 becomes 9, 3 becomes 13.
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Mathematics — Multi-Digit Subtraction with Borrowing
In 503 - 247, you need to borrow from the tens for the ones, but the tens digit is 0! First borrow from the hundreds: 5 becomes 4, 0 becomes 10. Then borrow from the new 10: 10 becomes 9, 3 becomes 13.