How do you learn your nine times tables?

Answer 1

Practice them everyday, no matter what. You will achieve your goal.

The simplest way is to hold out your hands. Take the number you want to multiply by 9 and count the fingers from the left. Hide that finger. So for 4, you hide the 4th finger. There are 3 fingers on the left side, and 6 on the right 4 times 9 is 36.

Sounds complicated to me. Notice that many results of multiplying by 9 produce a two figure answer in which the two figures al;ways add up to 9, so if you know that nine sevens are sixty something, the something will be a 3, but that method only works as far as 9 x 9 = 81. 10 times 9 and 11 times 9 are easy enough, but what about 12 x 9 ? Well the answer is 108, and the three figures add up to 9.

Also as you work from 1 times 9 to 12 times 9, the "units" figure (the one on the right) increases by 1 at each step, while the "tens" figure reduces by 1 at each step.

Another tip. If the total of the separate figures in a number can be divided exactly by 9, then the number itself can be divided by 9.

Example: the figures in the number 581,031 add up to 18, and 9 divides into 18, so 581,031 will divide by 9 giving the result 64,559