Subtract Across a Zero

5 questions0m 0s

Learn the skill

When the tens digit is zero and you need more ones, exchange one hundred for ten tens. Then exchange one of those tens for ten ones.

Worked example

402 - 176: rewrite 402 as 3 hundreds, 9 tens, and 12 ones. Subtract each place to get 2 hundreds, 2 tens, and 6 ones: 226.

1. 503 - 248 = ? Answer

2. 600 - 275 = ? Answer

3. 704 - 386 = ? Answer

4. 901 - 457 = ? Answer

5. A roll has 800 stickers. A class uses 364. How many remain? Answer