Let's solve each of the multiplication problems in your worksheet step by step. I'll go through them one at a time, showing the calculation and final answer.
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Row 1:
1. $ 35 \times 40 $
$ = 35 \times 4 \times 10 = 140 \times 10 = 1400 $
2. $ 21 \times 54 $
$ = (20 + 1) \times 54 = 20 \times 54 + 1 \times 54 = 1080 + 54 = 1134 $
3. $ 81 \times 99 $
$ = 81 \times (100 - 1) = 81 \times 100 - 81 = 8100 - 81 = 8019 $
4. $ 89 \times 25 $
$ = (90 - 1) \times 25 = 90 \times 25 - 1 \times 25 = 2250 - 25 = 2225 $
5. $ 85 \times 59 $
$ = 85 \times (60 - 1) = 85 \times 60 - 85 = 5100 - 85 = 5015 $
6. $ 81 \times 60 $
$ = 81 \times 6 \times 10 = 486 \times 10 = 4860 $
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Row 2:
7. $ 16 \times 73 $
$ = (10 + 6) \times 73 = 10 \times 73 + 6 \times 73 = 730 + 438 = 1168 $
8. $ 97 \times 78 $
Use standard multiplication:
$ 97 \times 78 = (100 - 3) \times 78 = 100 \times 78 - 3 \times 78 = 7800 - 234 = 7566 $
9. $ 39 \times 21 $
$ = (40 - 1) \times 21 = 40 \times 21 - 21 = 840 - 21 = 819 $
10. $ 57 \times 48 $
$ = (50 + 7) \times 48 = 50 \times 48 + 7 \times 48 = 2400 + 336 = 2736 $
11. $ 25 \times 67 $
$ = 25 \times (60 + 7) = 25 \times 60 + 25 \times 7 = 1500 + 175 = 1675 $
12. $ 10 \times 47 $
$ = 470 $
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Row 3:
13. $ 58 \times 26 $
$ = (60 - 2) \times 26 = 60 \times 26 - 2 \times 26 = 1560 - 52 = 1508 $
14. $ 41 \times 97 $
$ = 41 \times (100 - 3) = 4100 - 123 = 3977 $
15. $ 41 \times 85 $
$ = 41 \times (80 + 5) = 41 \times 80 + 41 \times 5 = 3280 + 205 = 3485 $
16. $ 10 \times 23 $
$ = 230 $
17. $ 41 \times 98 $
$ = 41 \times (100 - 2) = 4100 - 82 = 4018 $
18. $ 16 \times 74 $
$ = (10 + 6) \times 74 = 10 \times 74 + 6 \times 74 = 740 + 444 = 1184 $
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Row 4:
19. $ 54 \times 81 $
$ = (50 + 4) \times 81 = 50 \times 81 + 4 \times 81 = 4050 + 324 = 4374 $
20. $ 84 \times 36 $
$ = (80 + 4) \times 36 = 80 \times 36 + 4 \times 36 = 2880 + 144 = 3024 $
21. $ 39 \times 93 $
$ = (40 - 1) \times 93 = 40 \times 93 - 93 = 3720 - 93 = 3627 $
22. $ 46 \times 68 $
$ = (40 + 6) \times 68 = 40 \times 68 + 6 \times 68 = 2720 + 408 = 3128 $
23. $ 44 \times 18 $
$ = (40 + 4) \times 18 = 40 \times 18 + 4 \times 18 = 720 + 72 = 792 $
24. $ 10 \times 62 $
$ = 620 $
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✔ Final Answers:
1. 1400
2. 1134
3. 8019
4. 2225
5. 5015
6. 4860
7. 1168
8. 7566
9. 819
10. 2736
11. 1675
12. 470
13. 1508
14. 3977
15. 3485
16. 230
17. 4018
18. 1184
19. 4374
20. 3024
21. 3627
22. 3128
23. 792
24. 620
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You can now fill in these answers on your worksheet. Let me know if you'd like a printable version or explanation for any specific problem!
Parent Tip: Review the logic above to help your child master the concept of worksheet on multiplication for grade.
