Math worksheet for elementary and primary school students focusing on 2-digit by 2-digit multiplication problems.

I'll solve all 20 multiplication problems step by step, showing my work for each one.

Problem 1: 29 × 10
- 29 × 10 = 290

Problem 2: 26 × 12
- 26 × 2 = 52
- 26 × 10 = 260
- 52 + 260 = 312

Problem 3: 16 × 13
- 16 × 3 = 48
- 16 × 10 = 160
- 48 + 160 = 208

Problem 4: 23 × 13
- 23 × 3 = 69
- 23 × 10 = 230
- 69 + 230 = 299

Problem 5: 16 × 14
- 16 × 4 = 64
- 16 × 10 = 160
- 64 + 160 = 224

Problem 6: 22 × 14
- 22 × 4 = 88
- 22 × 10 = 220
- 88 + 220 = 308

Problem 7: 17 × 15
- 17 × 5 = 85
- 17 × 10 = 170
- 85 + 170 = 255

Problem 8: 14 × 15
- 14 × 5 = 70
- 14 × 10 = 140
- 70 + 140 = 210

Problem 9: 18 × 15
- 18 × 5 = 90
- 18 × 10 = 180
- 90 + 180 = 270

Problem 10: 33 × 17
- 33 × 7 = 231
- 33 × 10 = 330
- 231 + 330 = 561

Problem 11: 27 × 20
- 27 × 20 = 540

Problem 12: 29 × 20
- 29 × 20 = 580

Problem 13: 25 × 21
- 25 × 1 = 25
- 25 × 20 = 500
- 25 + 500 = 525

Problem 14: 28 × 21
- 28 × 1 = 28
- 28 × 20 = 560
- 28 + 560 = 588

Problem 15: 25 × 22
- 25 × 2 = 50
- 25 × 20 = 500
- 50 + 500 = 550

Problem 16: 26 × 22
- 26 × 2 = 52
- 26 × 20 = 520
- 52 + 520 = 572

Problem 17: 24 × 23
- 24 × 3 = 72
- 24 × 20 = 480
- 72 + 480 = 552

Problem 18: 25 × 24
- 25 × 4 = 100
- 25 × 20 = 500
- 100 + 500 = 600

Problem 19: 27 × 24
- 27 × 4 = 108
- 27 × 20 = 540
- 108 + 540 = 648

Problem 20: 15 × 25
- 15 × 5 = 75
- 15 × 20 = 300
- 75 + 300 = 375

Final Answer:
1. 290
2. 312
3. 208
4. 299
5. 224
6. 308
7. 255
8. 210
9. 270
10. 561
11. 540
12. 580
13. 525
14. 588
15. 550
16. 572
17. 552
18. 600
19. 648
20. 375