9 times 15 is 135. In symbols: 9 × 15 = 135, and 15 × 9 = 135 too.
9 × 15 means adding 9 to itself 15 times: that is 15 copies of 9, which add up to 135.
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108, ... (keep going to the 15th multiple). The 15th multiple of 9 is 135.
9 × 15 = 9 × 10 + 9 × 5 = 90 + 45 = 135.
135 ÷ 9 = 15
135 ÷ 15 = 9
135 is odd. Prime factorization: 3 × 3 × 3 × 5.
| Multiplication | Answer |
|---|---|
| 8 × 15 | 120 |
| 10 × 15 | 150 |
| 9 × 14 | 126 |
| 9 × 16 | 144 |
| 9 × 17 | 153 |
| 9 × 13 | 117 |
| 11 × 15 | 165 |
| 7 × 15 | 105 |
See also: factors of 135.
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