8 times 9 is 72. In symbols: 8 × 9 = 72, and 9 × 8 = 72 too.
8 × 9 means adding 8 to itself 9 times: 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 + 8 = 72.
8, 16, 24, 32, 40, 48, 56, 64, 72. The 9th multiple of 8 is 72.
8 × 9 = 8 × 4 + 8 × 5 = 32 + 40 = 72.
Halve one number and double the other: 8 × 9 = 4 × 18 = 72.
72 ÷ 8 = 9
72 ÷ 9 = 8
72 is even. Prime factorization: 2 × 2 × 2 × 3 × 3.
| Multiplication | Answer |
|---|---|
| 7 × 9 | 63 |
| 9 × 9 | 81 |
| 8 × 8 | 64 |
| 8 × 10 | 80 |
| 8 × 11 | 88 |
| 7 × 8 | 56 |
| 9 × 10 | 90 |
| 6 × 9 | 54 |
See also: factors of 72.
Other numbers? Browse the multiplication table, the squares and cubes or the exponent calculator.