It isn't necessary, nor particularly useful. Once you know the multiplication tables for one-digit numbers, you can do multiplication on paper for larger numbers. The time spent to memorize such multiplication tables for larger numbers would be better spent learning more advanced math concepts.
Of course not.
No, it is not.
The bullet represents a multiplication. You are supposed to do the multiplication before you do the additions.
6x5
None, because there is no multiplication involved.
Four plus four plus three?
plus saka minus
511 x 5
-9
-/+ = - +/- = - +/+ = + -/- = + Same goes for multiplication.
Multiplication and addition.
LMAO 6+1 = 7 because if u plus 1 to a number it just goes one morenumber higher. Work better on your mathematical problems and go to school to learn what 12345678910111213 divided by 52 equals. (aka learn division, multiplication, plusing, (especialy), and probably your alphabet. :P)