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