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Add and subtract 3-digit whole numbers · Grade 3 · B2.1

Name: ______________________

Date: ______________________

1
266 + 308 = ?
Warm-up
Answer:
2
421 + 428 = ?
Warm-up
Answer:
3
311 + 391 = ?
Warm-up
Answer:
4
794 − 314 = ?
On level
Answer:
5
696 − 250 = ?
On level
Answer:
6
742 − 330 = ?
On level
Answer:
7
502 + 782 = ?
Challenge
Answer:
8
762 + 615 = ?
Challenge
Answer:
9
754 + 771 = ?
Challenge
Answer:

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Worksheet code: eyJzIjoibnVtYmVyLWFkZC1zdWJ0cmFjdC0zZGlnaXQiLCJkIjpbMTk4NzkxMDQzMCw0Nzg4NzUyODksNDA4MDU3ODI5LDcxNzYwMjY1MSwzNDU2MDY5ODcsMTg0MzA2MjgxLDE2NDA5NjI1NTgsMTUwMzMzNjAzNiwyMDI3MjcyNzJdLCJ2IjoxfQ.d07a9ee0cd9b

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Answer key · Add and subtract 3-digit whole numbers

1.
574 — Add the hundreds, tens, and ones: 266 + 308 = 574.
2.
849 — Add the hundreds, tens, and ones: 421 + 428 = 849.
3.
702 — Add the hundreds, tens, and ones: 311 + 391 = 702.
4.
480 — Subtract 314 from 794 to get 480.
5.
446 — Subtract 250 from 696 to get 446.
6.
412 — Subtract 330 from 742 to get 412.
7.
1284 — Line up the digits and regroup as you add: 502 + 782 = 1284.
8.
1377 — Line up the digits and regroup as you add: 762 + 615 = 1377.
9.
1525 — Line up the digits and regroup as you add: 754 + 771 = 1525.