This is just basic algebra. (a x c) + (b x c) = (a+b) x c. In this case a=2 and b=1.Originally posted here by xxxx123
"3 x 4 = (2 x 4) + 4"
"3 x 9 = (2 x 9) + 9"
how did you come to that conclusion?
How about 6x4=(2x4)+(4x4)? 2 and 4 are easily done using shifts.
Or really freaky 7x4=(2x4)+(4x4)+4
Yep. In the repeated substraction count the number of times you're able to substract.
so i guess that for division we just use repeated subtration right or shift to the right,correct?
Or shift to the right, which is a division by 2.