How about: 3 times -6 = -18 as one example
They are: 1*18 = 18, 2*9 = 18 and 3*6 = 18
4005
56
Multiply 18 by a series of numbers. Therefore, multiples of 18 are, as follows: 18, 36, 54, 72, 90, 108...
Presumably, the theory is that it's easier to multiply by small numbers than larger ones. If there's a number that you need multiplied by 18, multiply it by 3, then multiply that total by 3, then multiply that total by 2.
If you meant what whole numbers can you use to multiply to 18, there's 9x2, 6x3, and of course 1x18 but you could multiply any number[s] to 18
Multiply 18 by successive counting numbers.
Multiply 11 by 18 and multiply that total by successive counting numbers.
-18 and -18
-1
15
You can multiply the number 18 by different numbers that are relatively prime, for example by different prime numbers.
They are: 1*18 = 18, 2*9 = 18 and 3*6 = 18
3 x6 =18 2 x9 =18 1 x 18 =18
-20
4 and - 18
you multiply the numbers together, which is 18