Math: Easy times tables (9 x)

I don't really want to brag, but my son is great with math. He sometimes helps me and his sister when we struggle and he is only 13. When he was 12 (last year) he figured out some formulas to make some times tables easy.

I have his permission to share these easy times tables formulas with you, so I hope everybody will respect him as well and rather send people this way to find out more about these awesome formulas to make the tables easier.

If in any way you don't understand the following formulas, please don't hesitate to contact me, because he can explain if I'm not sure how to answer and he has explained these formulas to me so many times that I also understand them very well, but you will see that it is very very easy.

Let's start with the:

9 x table:

Counting first:

•  counting in nines is allot easier than I thought, but I do think that there are allot of people who already know this secret, but just to make the 9 x table understandable, let's start here.
  
  
  •  you count: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99. 108, 117, 126, 135, 144, 153......
  
  
  • now let's look at the pattern:
  
  
  •  to count from any number, you just add one to the number in front and deduct one from the number at the back - for instance, 18 + 9       
  
  1 + 1 = 2
  8 - 1 = 7
  So your answer is 27
  
  
  • Let's take another one, count in nine from 108: 
   10 + 1 + 11

           8 - 1 = 7

       So your answer is 117

9 x table easy formula

• Now let's look at the best way to answer any 9 x table when you get these, with this formula, you can answer without even really thinking, if you can teach your kids these, they will think that the 9 x is the easiest.
  
  
  • Let's look at 9 x 6:
  
  
  • for the number in the front, you deduct one from the number that you have to multiply by nine.
  • In this case it is 6 (6 - 1 = 5)
  •  For the number at the back, you take the number that you must multiply by nine and deduct it from 10 ( 10 - 6 = 4)
  • So, your answer is 54
  • If you wish, you can check me with your calculator, I am certain my answer is correct.
  
  
  • Let's take another one, just to be sure:
  • 9  x 3
  • 3 - 1 =  2
  •  10 - 2 = 8
  • So your answer is 28
  •  Just one more, just to be sure
  • 9 x 9 = 
  • 9 - 1 = 8
  • 10 - 9 = 1
  • so the answer is 81
   
•  We all know that times 10 you just put a 0 at the back, so the same rule applies for 9 x 10 and we all know that for times 11 the number is just repeated, like 9 x 11 - 99, so use these rules for them, but what happens after 12?

• for the number at the back, you still subtract one from the last number
• for the number in front, you subtract two
• let's take 14 x 9
• 14 - 2 = 12
• 10 - 4 = 6
• so your answer is 126

• just another one, to make sure the formula works:
• 16 x 9 
• 16 - 2 = 14
• 10 - 6 = 4
• so your answer will be 144 

If for some or the other reason you want to go higher, for the number in front, the formula increases, so for instance if you want to multiply with something in the twenties, you will deduct 3 and for something in the thirties, 4 - in the same manner as shown above.

I hope that these formulas will help you to make the nine times table easy and that your children will not struggle with them any more.

The reason I took the 9 x table first is because - unbelievably, this one is one of the easy formulas.

I did put these formulas on my website at all-about-life-tips as well, because that is also my site, so this is not a duplicate and I did type the whole thing over again, so if you did see it there, you will know that I did not expand to what happens after 12 and 20's and so on.

My main conclusion with this is that the fact that a child has ADHD does not prevent them from being exceptionally intelligent as long as they love what they do.

If you enjoyed this formula, please invite your friends to come and have a look, I am sure they will appreciate it. Before I knew this, the 9 x table was the only one I could not do. The other ones I learned like a parrot or counted on my fingers. (even as a grown-up)