18 times 19 is 342. In symbols: 18 × 19 = 342, and 19 × 18 = 342 too.
18 × 19 means adding 18 to itself 19 times: that is 19 copies of 18, which add up to 342.
18, 36, 54, 72, 90, 108, 126, 144, 162, 180, 198, 216, ... (keep going to the 19th multiple). The 19th multiple of 18 is 342.
18 × 19 = 18 × 10 + 18 × 9 = 180 + 162 = 342.
Halve one number and double the other: 18 × 19 = 9 × 38 = 342.
342 ÷ 18 = 19
342 ÷ 19 = 18
342 is even. Prime factorization: 2 × 3 × 3 × 19.
| Multiplication | Answer |
|---|---|
| 17 × 19 | 323 |
| 19 × 19 | 361 |
| 18 × 18 | 324 |
| 18 × 20 | 360 |
| 18 × 21 | 378 |
| 17 × 18 | 306 |
| 19 × 20 | 380 |
| 16 × 19 | 304 |
Other numbers? Browse the multiplication table, the squares and cubes or the exponent calculator.