20 multiplied by 21 is 420
20 × 21 = 420
Explanation: Multiplication is repeated addition. So, 20 × 21 means adding 20, 21 times:
20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 + 20 = 420
Word Problem Style
If you have 21 boxes and each box contains 20 apples, then the total number of apples is 420.
Quick Facts
- 20 is called the multiplicand.
- 21 is called the multiplier.
- The result, 420, is called the product.
Multiplication Table for 20
| 20 × N | Result |
|---|---|
| 20 × 1 | 20 |
| 20 × 2 | 40 |
| 20 × 3 | 60 |
| 20 × 4 | 80 |
| 20 × 5 | 100 |
| 20 × 6 | 120 |
| 20 × 7 | 140 |
| 20 × 8 | 160 |
| 20 × 9 | 180 |
| 20 × 10 | 200 |
| 20 × 11 | 220 |
| 20 × 12 | 240 |