To solve these multiplication problems, we use a simple rule: when you multiply any number by 10, 100, or 1000, you just add the same number of zeros to the end of that number.
- Multiply by
10 → add
one zero
- Multiply by
100 → add
two zeros
- Multiply by
1000 → add
three zeros
Let’s go through each problem one by one and apply this rule.
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1. 63 × 100 → Add two zeros → 6300
2. 29 × 1000 → Add three zeros → 29000
3. 74 × 10 → Add one zero → 740
4. 43 × 100 → Add two zeros → 4300
5. 71 × 100 → Add two zeros → 7100
6. 48 × 1000 → Add three zeros → 48000
7. 94 × 10 → Add one zero → 940
8. 23 × 1000 → Add three zeros → 23000
9. 50 × 100 → Add two zeros → 5000
10. 77 × 10 → Add one zero → 770
11. 865 × 100 → Add two zeros → 86500
12. 607 × 10 → Add one zero → 6070
13. 282 × 1000 → Add three zeros → 282000
14. 919 × 100 → Add two zeros → 91900
15. 764 × 1000 → Add three zeros → 764000
16. 281 × 100 → Add two zeros → 28100
17. 635 × 10 → Add one zero → 6350
18. 599 × 100 → Add two zeros → 59900
19. 173 × 1000 → Add three zeros → 173000
20. 416 × 10 → Add one zero → 4160
All calculations are done using the zero-addition rule — no complex math needed!
Final Answer:
1. 6300
2. 29000
3. 740
4. 4300
5. 7100
6. 48000
7. 940
8. 23000
9. 5000
10. 770
11. 86500
12. 6070
13. 282000
14. 91900
15. 764000
16. 28100
17. 6350
18. 59900
19. 173000
20. 4160
Parent Tip: Review the logic above to help your child master the concept of multiplication 4 grade.
