Let’s solve each multiplication problem step by step. We’ll multiply 3-digit numbers carefully, using the standard method (multiplying by each digit and adding).
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Problem 1: 374 × 233
Break it down:
- 374 × 3 = 1,122
- 374 × 30 = 11,220
- 374 × 200 = 74,800
Add them:
1,122 + 11,220 = 12,342
12,342 + 74,800 =
87,142
✔ Check: 374 × 233 = 87,142
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Problem 2: 458 × 671
Break it down:
- 458 × 1 = 458
- 458 × 70 = 32,060
- 458 × 600 = 274,800
Add them:
458 + 32,060 = 32,518
32,518 + 274,800 =
307,318
✔ Check: 458 × 671 = 307,318
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Problem 3: 297 × 308
Break it down:
- 297 × 8 = 2,376
- 297 × 0 = 0 → skip
- 297 × 300 = 89,100
Add them:
2,376 + 89,100 =
91,476
✔ Check: 297 × 308 = 91,476
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Problem 4: 678 × 456
Break it down:
- 678 × 6 = 4,068
- 678 × 50 = 33,900
- 678 × 400 = 271,200
Add them:
4,068 + 33,900 = 37,968
37,968 + 271,200 =
309,168
✔ Check: 678 × 456 = 309,168
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Problem 5: 907 × 308
Break it down:
- 907 × 8 = 7,256
- 907 × 0 = 0 → skip
- 907 × 300 = 272,100
Add them:
7,256 + 272,100 =
279,356
✔ Check: 907 × 308 = 279,356
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Problem 6: 779 × 197
Break it down:
- 779 × 7 = 5,453
- 779 × 90 = 70,110
- 779 × 100 = 77,900
Add them:
5,453 + 70,110 = 75,563
75,563 + 77,900 =
153,463
✔ Check: 779 × 197 = 153,463
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Problem 7: 872 × 385
Break it down:
- 872 × 5 = 4,360
- 872 × 80 = 69,760
- 872 × 300 = 261,600
Add them:
4,360 + 69,760 = 74,120
74,120 + 261,600 =
335,720
✔ Check: 872 × 385 = 335,720
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Problem 8: 429 × 378
Break it down:
- 429 × 8 = 3,432
- 429 × 70 = 30,030
- 429 × 300 = 128,700
Add them:
3,432 + 30,030 = 33,462
33,462 + 128,700 =
162,162
✔ Check: 429 × 378 = 162,162
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Problem 9: 268 × 489
Break it down:
- 268 × 9 = 2,412
- 268 × 80 = 21,440
- 268 × 400 = 107,200
Add them:
2,412 + 21,440 = 23,852
23,852 + 107,200 =
131,052
✔ Check: 268 × 489 = 131,052
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Problem 10: 508 × 809
Break it down:
- 508 × 9 = 4,572
- 508 × 0 = 0 → skip
- 508 × 800 = 406,400
Add them:
4,572 + 406,400 =
410,972
✔ Check: 508 × 809 = 410,972
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Problem 11: 672 × 858
Break it down:
- 672 × 8 = 5,376
- 672 × 50 = 33,600
- 672 × 800 = 537,600
Add them:
5,376 + 33,600 = 38,976
38,976 + 537,600 =
576,576
✔ Check: 672 × 858 = 576,576
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Problem 12: 358 × 297
Break it down:
- 358 × 7 = 2,506
- 358 × 90 = 32,220
- 358 × 200 = 71,600
Add them:
2,506 + 32,220 = 34,726
34,726 + 71,600 =
106,326
✔ Check: 358 × 297 = 106,326
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Final Answer:
1. 87,142
2. 307,318
3. 91,476
4. 309,168
5. 279,356
6. 153,463
7. 335,720
8. 162,162
9. 131,052
10. 410,972
11. 576,576
12. 106,326
Parent Tip: Review the logic above to help your child master the concept of math worksheet for 7th graders printable.
