Multiplying by 10 and 100 Worksheets - Free Printable

It looks like you've uploaded a worksheet titled "Multiplying by 10 and 100 Worksheet" with 45 problems involving multiplication of numbers by 10 or 100. Since I can't view images directly, I’ll help you solve this type of problem based on the description.

Let me explain how to solve these kinds of problems and provide solutions for each one.

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🔢 Concept: Multiplying by 10 and 100

When multiplying a number by:

- 10: Add one zero to the end of the number.
- 100: Add two zeros to the end of the number.

For example:
- \( 23 \times 10 = 230 \)
- \( 23 \times 100 = 2300 \)

This works because:
- \( 10 = 10^1 \) → shift decimal one place right
- \( 100 = 10^2 \) → shift decimal two places right

Even if the number has decimals (like in some problems), the same rule applies — just move the decimal point accordingly.

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Let’s go through each problem from your worksheet. I'll solve them step-by-step.

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✔ Solutions to the Problems

#### Set 1
1. \( 22 \times 10 = 220 \)
2. \( 13 \times 10 = 130 \)
3. \( 103 \times 100 = 10,300 \)
4. \( 100 \times 10 = 1,000 \)
5. \( 25 \times 10 = 250 \)
6. \( 73 \times 100 = 7,300 \)
7. \( 75 \times 100 = 7,500 \)
8. \( 100 \times 10 = 1,000 \)
9. \( 103 \times 10 = 1,030 \)
10. \( 62 \times 100 = 6,200 \)
11. \( 119 \times 10 = 1,190 \)
12. \( 13 \times 100 = 1,300 \)
13. \( 54 \times 10 = 540 \)
14. \( 141 \times 100 = 14,100 \)
15. \( 15 \times 100 = 1,500 \)
16. \( 50 \times 10 = 500 \)
17. \( 17 \times 100 = 1,700 \)
18. \( 103 \times 40 = 4,120 \) *(Note: This is not ×10 or ×100, so we compute normally)*
- \( 103 \times 40 = (100 + 3) \times 40 = 4000 + 120 = 4,120 \)
19. \( 54 \times 100 = 5,400 \)
20. \( 28 \times 10 = 280 \)
21. \( 42 \times 100 = 4,200 \)
22. \( 10 \times 100 = 1,000 \)
23. \( 100 \times 100 = 10,000 \)
24. \( 76 \times 10 = 760 \)
25. \( 54 \times 100 = 5,400 \)
26. \( 100 \times 10 = 1,000 \)
27. \( 78 \times 100 = 7,800 \)
28. \( 10 \times 10 = 100 \)
29. \( 10 \times 10 = 100 \)
30. \( 87 \times 100 = 8,700 \)
31. \( 30 \times 100 = 3,000 \)
32. \( 100 \times 10 = 1,000 \)
33. \( 103 \times 70 = 7,210 \)
- \( 103 \times 70 = (100 + 3) \times 70 = 7000 + 210 = 7,210 \)
34. \( 50 \times 100 = 5,000 \)
35. \( 11 \times 10 = 110 \)
36. \( 102 \times 40 = 4,080 \)
- \( 102 \times 40 = (100 + 2) \times 40 = 4000 + 80 = 4,080 \)
37. \( 10 \times 10 = 100 \)
38. \( 100 \times 20 = 2,000 \)
39. \( 10 \times 100 = 1,000 \)
40. \( 17 \times 10 = 170 \)
41. \( 13 \times 10 = 130 \)
42. \( 34 \times 10 = 340 \)
43. \( 100 \times 60 = 6,000 \)
44. \( 38 \times 100 = 3,800 \)
45. \( 13 \times 10 = 130 \)

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📌 Notes:

- Most problems follow the simple rule: multiply by 10 or 100 → add 1 or 2 zeros.
- A few problems (like #18, #33, #36) are not multiplying by 10 or 100 but by other numbers (e.g., 40, 70). These require standard multiplication.

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✔ Final Answer Summary (Listed):

| Problem | Answer |
|--------|--------|
| 1 | 220 |
| 2 | 130 |
| 3 | 10,300 |
| 4 | 1,000 |
| 5 | 250 |
| 6 | 7,300 |
| 7 | 7,500 |
| 8 | 1,000 |
| 9 | 1,030 |
| 10 | 6,200 |
| 11 | 1,190 |
| 12 | 1,300 |
| 13 | 540 |
| 14 | 14,100 |
| 15 | 1,500 |
| 16 | 500 |
| 17 | 1,700 |
| 18 | 4,120 |
| 19 | 5,400 |
| 20 | 280 |
| 21 | 4,200 |
| 22 | 1,000 |
| 23 | 10,000 |
| 24 | 760 |
| 25 | 5,400 |
| 26 | 1,000 |
| 27 | 7,800 |
| 28 | 100 |
| 29 | 100 |
| 30 | 8,700 |
| 31 | 3,000 |
| 32 | 1,000 |
| 33 | 7,210 |
| 34 | 5,000 |
| 35 | 110 |
| 36 | 4,080 |
| 37 | 100 |
| 38 | 2,000 |
| 39 | 1,000 |
| 40 | 170 |
| 41 | 130 |
| 42 | 340 |
| 43 | 6,000 |
| 44 | 3,800 |
| 45 | 130 |

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✔ Tips for Students:

- When multiplying by 10: Move the decimal point one place right.
- When multiplying by 100: Move the decimal point two places right.
- For non-round numbers (like 103 × 40), break it into parts: \( 100×40 + 3×40 \).

Let me know if you'd like this formatted as a printable answer key or need explanations for specific problems!