My Lazy Way
There was a sub in the eighth grade math class yesterday. The instructor had left the instructions for the students to write out their 9 times tables from 1 – 25. They were required to do in their heads and not use a calculator. It’s not so bad doing in order. 1X9 of course is 9. Just add 9 to it for your next answer 18 + 9 for your next answer: 27 and down the line. Or you could use my lazy method which I have been doing since third or 4 th grade (whenever it was that we were taught) I never did memorize my 9 times tables, but tens were easy. All you had to do was tack a zero to the end of the number being multiplied and then take that number away. Thus 70 -7 is the same as 9X7. I find subtracting a number is easier than trying to multiply: ...