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

Name: ______________________

Date: ______________________

1
232 + 252 = ?
Warm-up
Answer:
2
237 + 361 = ?
Warm-up
Answer:
3
128 + 127 = ?
Warm-up
Answer:
4
464 − 240 = ?
On level
Answer:
5
774 − 370 = ?
On level
Answer:
6
821 − 176 = ?
On level
Answer:
7
682 + 799 = ?
Challenge
Answer:
8
763 + 606 = ?
Challenge
Answer:
9
779 + 673 = ?
Challenge
Answer:

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Worksheet code: eyJzIjoibnVtYmVyLWFkZC1zdWJ0cmFjdC0zZGlnaXQiLCJkIjpbMTM4NDUxNTQ3NCwxMTAyOTcyMzExLDE0MTU2OTU5MCwyOTg0MTI5NiwxMzgwODQwODg3LDEwMjkyOTAyMDUsNDY2NjUxNzksMTE2ODE2MjAzNSwzNTkzODQ3MzldLCJ2IjoxfQ.12633d747393

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Answer key · Add and subtract 3-digit whole numbers

1.
484 — Add the hundreds, tens, and ones: 232 + 252 = 484.
2.
598 — Add the hundreds, tens, and ones: 237 + 361 = 598.
3.
255 — Add the hundreds, tens, and ones: 128 + 127 = 255.
4.
224 — Subtract 240 from 464 to get 224.
5.
404 — Subtract 370 from 774 to get 404.
6.
645 — Subtract 176 from 821 to get 645.
7.
1481 — Line up the digits and regroup as you add: 682 + 799 = 1481.
8.
1369 — Line up the digits and regroup as you add: 763 + 606 = 1369.
9.
1452 — Line up the digits and regroup as you add: 779 + 673 = 1452.