Multiplication Table of 9 Made Easy
To most of us multiplication is one of the hardest to do especially for numbers six and up. well, just read on and you will discover that it’s such a breeze to multiply with the number 9.
Yes, multiplication table is one of the easiest next to tables of 0, 1 and 2.
Most of us fear this number, 9, because it is such a horror to multiply that big number to other numbers. But fear not cause I will show you how this multiplication table is going to be so easy for you.
First take a look t it:
| 9 x 1 = 9 | 9 x 6 = 54 |
| 9 x 2 = 18 | 9 x 7 = 63 |
| 9 x 3 = 27 | 9 x 8 = 72 |
| 9 x 4 = 36 | 9 x 9 = 81 |
| 9 x 5 = 45 | 9 x 10 = 90 |
looking at it now, do you notice anything?
Okay, let me rewrite it, here goes:
| 9 x 1 = 9 | 9 x 10 = 90 |
| 9 x 2 = 18 | 9 x 9 = 81 |
| 9 x 3 = 27 | 9 x 8 = 72 |
| 9 x 4 = 36 | 9 x 7 = 63 |
| 9 x 5 = 45 | 9 x 6 = 54 |
now, look at the color coded number.
Notice that the product of 9 x 2 being 18 is the reverse of 9 x 9 being 81. The same goes for 9 x 3 = 27 and 9 x 8 = 72, and so on and so forth.
Another, tip is this. Let’s take 9 x 3 = 27. Notice that the product 27 if written 2 + 7 = 9. And 2 is one less than 3. So, to simplify it the product of any numbers from 1 to 10 multiplied by 9 when added together is always equivalent to 9. Another thing is subtract 1 from the number to be multiplied by 9 then think of a number to add to it that will give the sum of 9.
To illustrate it let’s take :
9 x 8 = 72, 7 is 1 less 8, add 2 to it and you get 9.
9 x 8 = 72 (7 + 2 = 9).
I hope this material helps everyone who reads this.
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9 Responses to “Multiplication Table of 9 Made Easy”
On May 18, 2007 at 6:04 pm
That is awesomely keen! I have never noticed that pattern in the 9’s tt’s and I’m an advocate and avid writer of the 0 and 1 to 9 teaching concept in numbering and counting. Thank you for sharing it!
On August 23, 2007 at 10:46 am
i’m glad to share it and thank you for your comment.
On June 26, 2008 at 10:33 pm
This is good for children learning their time-table! Any other tips for the other time-tables?
On July 23, 2008 at 3:58 am
you really make it easy
On July 30, 2008 at 10:51 am
I like that multiplication table. Will tell my friends to check out. Great
On August 9, 2008 at 2:36 am
wow..i think this is very helpful.. good thinking…
On October 24, 2008 at 4:50 am
cool! nice math teachings! wow it amazed me!
On November 27, 2008 at 6:14 pm
Perhaps I date myself, but the multiplication table ALWAYS included the 11x and 12x for integers up to 12 when I was a child! And my husband and I withdrew our child from the public school when we learned this (and sent him and his siblings as they came along to parochial schools… and my husband was Jewish!).
The “new mathematicians” saw NO NEED for the possibility of needing, for example, to price out units of dozens mentally… which to this day is faster than any hand calculator!
Guess who I consider brain dead! Not the kids who cannot figure the price of one diamond when a set are sold by the dozen ROFL… it is the “reformed” educational dicta of the guru’s who are dumbing down America.
Rote memory is still the fastest and most efficient way to learn basics. Further, it not only keeps mental muscles well exercised, it is also the one method of learning that any level of intellect can utilize efficiently, at virtually all levels of the bell curve.
And it isn’t just math. I had qualified with all course work completed for my General Elementary teaching credential when I walked in for my first day of practice teaching, the last step for certification…. and found my master teacher teaching reading with oversized flip cards having single words on them, so the first graders on the floor rug could see that, as she held up the “L O O K” card, that “look” has two big eyes! It was the “new English” lol of the “look and see” method of teaching reading.
I had prepared a lesson (based on an oversized jig-saw puzzle with Dr. Suess characters) designed to make memorizing the alphabet fun. She told me to “forget it. We don’t teach the alphabet these days.” My response (and this was 20 years before the first PC computer hit the retail markets LOL)was “Well, you are sure raising a generation of helpless file clerks and office workers!” and I switched my credential preparation to General Secondary and taught high school and community college level English instead.
Of course, I had the challenge of teaching youngsters who came to me to read and write adequately, but the result was rewarding.
Year after year those students, who adored diagramming sentences and who understood parts of speech, sentence structure, and paragraphing, won trophies all over the state of California in tournaments and competitions, and these students were not tracked; that had been abandoned as being “politically incorrect” with uneducated legislators thinking that mixing ability and achievement levels in the classroom such a great idea… little realizing (one must expect)the harm being done to the very students they thought they were helping.
When a class is heterogeneously grouped by ability, the average teacher will teach “to” the middle abilities, boring the gifted, and leaving the challenged behind.
Education needs reform… with respect given to methods going back to Socretes, and not the so-called shortcuts which these days make humans helples slaves of computer robotics.
The 9x table? Simple! Write down the table THROUGH the 12x, using PAF! (Primitive Art Form… handwriting!) …and read, repeat, out loud if possible, until the best computer you possess can spit it out without thinking… your BRAIN. Don’t teach people to become dependent on machines!!!!!
On May 22, 2009 at 7:01 am
Thank you all for your comments!
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