3 times 30 is 90. In symbols: 3 × 30 = 90, and 30 × 3 = 90 too.
3 × 30 means adding 3 to itself 30 times: that is 30 copies of 3, which add up to 90.
3, 6, 9, 12, 15, 18, 21, 24, 27, 30, 33, 36, ... (keep going to the 30th multiple). The 30th multiple of 3 is 90.
3 × 30 = 3 × 30 = 90 = 90.
Halve one number and double the other: 3 × 30 = 15 × 6 = 90.
90 ÷ 3 = 30
90 ÷ 30 = 3
90 is even. Prime factorization: 2 × 3 × 3 × 5.
| Multiplication | Answer |
|---|---|
| 2 × 30 | 60 |
| 4 × 30 | 120 |
| 3 × 29 | 87 |
| 3 × 28 | 84 |
| 5 × 30 | 150 |
See also: factors of 90.
Other numbers? Browse the multiplication table, the squares and cubes or the exponent calculator.