Remembering the twin of a multiplication makes it easier to learn the multiplication table, as there are fewer multiplications to learn. For example, 2x8 and 8x2 both equal 16.
When multiplying even numbers by six, the tens column of the result will always be half of the number being multiplied, while the number being multiplied is always the number in the units column.
When multiplying by 10, add a zero to the number being multiplied to get the result. This is also a helpful way to learn the five times table. As five is half of 10, first multiply the number by 10, and then halve it to get the result.