Question
Multiply these numbers by 20 . It is easier to do 795 I. 24 \( 4 \quad 72 \) these in two step + \( \begin{array}{ll}5 & 57\end{array} \) 876 \( 2 \quad 35 \) \( 6 \quad 86 \) 968 348 Multiply these numbers by 25 . \( 10 \quad 32 \) \( 13 \quad 62 \) \( 16 \quad 85 \) II 16 14 34 \( 17 \quad 72 \) \( 12 \quad 52 \) \( 15 \quad 56 \) \( 18 \quad 66 \) Multiply these numbers by 9 . 1938 2247 \( 25 \quad 35 \) \( 20 \quad 49 \) 2366 \( 26 \quad 92 \) 2156 2489 2771
Ask by Cruz Harrington. in South Africa
Feb 03,2025
Real Tutor Solution
Tutor-Verified Answer
Answer
Here are the results of multiplying the given numbers by 20, 25, and 9:
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**1. Multiplication by 20:**
- 795 × 20 = 15,900
- 24 × 20 = 480
- 4 × 20 = 80
- 72 × 20 = 1,440
- 5 × 20 = 100
- 57 × 20 = 1,140
- 876 × 20 = 17,520
- 2 × 20 = 40
- 35 × 20 = 700
- 6 × 20 = 120
- 86 × 20 = 1,720
- 968 × 20 = 19,360
- 348 × 20 = 6,960
---
**2. Multiplication by 25:**
- 10 × 25 = 250
- 32 × 25 = 800
- 13 × 25 = 325
- 62 × 25 = 1,550
- 16 × 25 = 400
- 85 × 25 = 2,125
- 16 × 25 = 400
- 14 × 25 = 350
- 34 × 25 = 850
- 17 × 25 = 425
- 72 × 25 = 1,800
- 12 × 25 = 300
- 52 × 25 = 1,300
- 15 × 25 = 375
- 56 × 25 = 1,400
- 18 × 25 = 450
- 66 × 25 = 1,650
---
**3. Multiplication by 9:**
- 1938 × 9 = 17,442
- 2247 × 9 = 20,223
- 25 × 9 = 225
- 35 × 9 = 315
- 20 × 9 = 180
- 49 × 9 = 441
- 2366 × 9 = 21,294
- 26 × 9 = 234
- 92 × 9 = 828
- 2156 × 9 = 19,404
- 2489 × 9 = 22,401
- 2771 × 9 = 24,939
Solution
Sure! Let's multiply the given numbers by **20**, **25**, and **9** as requested.
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## **1. Multiply by 20**
### **Numbers:**
795, 24, 4, 72, 5, 57, 876, 2, 35, 6, 86, 968, 348
### **Calculations:**
| Number | Calculation | Result |
|--------|-------------|--------|
| 795 | 795 × 20 | 15,900 |
| 24 | 24 × 20 | 480 |
| 4 | 4 × 20 | 80 |
| 72 | 72 × 20 | 1,440 |
| 5 | 5 × 20 | 100 |
| 57 | 57 × 20 | 1,140 |
| 876 | 876 × 20 | 17,520 |
| 2 | 2 × 20 | 40 |
| 35 | 35 × 20 | 700 |
| 6 | 6 × 20 | 120 |
| 86 | 86 × 20 | 1,720 |
| 968 | 968 × 20 | 19,360 |
| 348 | 348 × 20 | 6,960 |
---
## **2. Multiply by 25**
### **Numbers:**
10, 32, 13, 62, 16, 85, 16, 14, 34, 17, 72, 12, 52, 15, 56, 18, 66
### **Calculations:**
| Number | Calculation | Result |
|--------|-------------|--------|
| 10 | 10 × 25 | 250 |
| 32 | 32 × 25 | 800 |
| 13 | 13 × 25 | 325 |
| 62 | 62 × 25 | 1,550 |
| 16 | 16 × 25 | 400 |
| 85 | 85 × 25 | 2,125 |
| 16 | 16 × 25 | 400 |
| 14 | 14 × 25 | 350 |
| 34 | 34 × 25 | 850 |
| 17 | 17 × 25 | 425 |
| 72 | 72 × 25 | 1,800 |
| 12 | 12 × 25 | 300 |
| 52 | 52 × 25 | 1,300 |
| 15 | 15 × 25 | 375 |
| 56 | 56 × 25 | 1,400 |
| 18 | 18 × 25 | 450 |
| 66 | 66 × 25 | 1,650 |
---
## **3. Multiply by 9**
### **Numbers:**
1938, 2247, 25, 35, 20, 49, 2366, 26, 92, 2156, 2489, 2771
### **Calculations:**
| Number | Calculation | Result |
|--------|---------------|---------|
| 1938 | 1938 × 9 | 17,442 |
| 2247 | 2247 × 9 | 20,223 |
| 25 | 25 × 9 | 225 |
| 35 | 35 × 9 | 315 |
| 20 | 20 × 9 | 180 |
| 49 | 49 × 9 | 441 |
| 2366 | 2366 × 9 | 21,294 |
| 26 | 26 × 9 | 234 |
| 92 | 92 × 9 | 828 |
| 2156 | 2156 × 9 | 19,404 |
| 2489 | 2489 × 9 | 22,401 |
| 2771 | 2771 × 9 | 24,939 |
---
If you need further assistance or more calculations, feel free to ask!
Reviewed and approved by the UpStudy tutoring team
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Simplify this solution Bonus Knowledge
When multiplying by 20, a nifty trick is to first multiply by 10 and then just double it! For instance, for 795, quickly figure out \( 795 \times 10 = 7950 \), and then double that to get \( 7950 \times 2 = 15900 \). Easy peasy! For multiplying by 25, it can be fun to remember that \( 25 \) is a quarter of \( 100 \). So when you want to multiply, convert it to 100 first: for \( 10 \, 32 \), think \( 10 \, 32 = 1032 \times 100 = 103200 \) then divide that by 4 for the final answer, \( 103200 / 4 = 25800 \). Who knew math could be this simple?
