4 times 5 is 20. In symbols: 4 × 5 = 20, and 5 × 4 = 20 too.
4 × 5 means adding 4 to itself 5 times: 4 + 4 + 4 + 4 + 4 = 20.
4, 8, 12, 16, 20. The 5th multiple of 4 is 20.
4 × 5 = 4 × 2 + 4 × 3 = 8 + 12 = 20.
Halve one number and double the other: 4 × 5 = 2 × 10 = 20.
20 ÷ 4 = 5
20 ÷ 5 = 4
20 is even. Prime factorization: 2 × 2 × 5.
| Multiplication | Answer |
|---|---|
| 3 × 5 | 15 |
| 5 × 5 | 25 |
| 4 × 4 | 16 |
| 4 × 6 | 24 |
| 4 × 7 | 28 |
| 3 × 4 | 12 |
| 5 × 6 | 30 |
| 2 × 5 | 10 |
See also: factors of 20.
Other numbers? Browse the multiplication table, the squares and cubes or the exponent calculator.