Multiplying by 12 shortcut

So how does the 12’s shortcut work?
Let’s take a look.
12 X 7
the first thing is to always multiply the 1 of the twelve by the number we are multiplying
by, in this case 7. So 1 X 7 = 7.
Multiply this 7 by 10 giving 70. (Why? We are working with BASES here. Bases are the
fundamentals […]