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Grade 3

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Subtracting in columns

Within 1000. Part of numbers to 1000.

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Subtracting in columns

Within 1000 · Alberta Grade 3 · maddyhelps.com

Name
Date

The first two need no borrowing and the rest do. When the top digit is too small, trade one from the next column — that is what crossing out and writing a small number means.

 478
− 253
 562
− 341
 624
− 158
 703
− 246
 815
− 367
 900
− 425

For the grown-up

Subtracting in columns

225, 221, 466, 457, 448, 475.

The last one is the hardest: 900 − 425 needs two trades in a row, because the middle column has nothing to lend until it has borrowed itself.

Why this matters is on the numbers to 1000 page. More sheets