The 9 Times Quickie

8/12/2019 The 9 Times Quickie

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The 9 Times Quickie

1. Hold your hands in front of you with your fingers spread out.

2. For 9 X 3 bend your third finger down. (9 X 4 would be the fourth finger etc.)

3. You have 2 fingers in front of the bent finger and 7 after the bent finger.

4. Thus the answer must be 27.

5. This technique works for the 9 times tables up to 10.

The 4 Times Quickie

1. If you know how to double a number, this one is easy.

2. Simply, double a number and then double it again!

The 11 Times Rule #1

1. Take any number to 10 and multiply it by 11.

2. Multiply 11 by 3 to get 33, multiply 11 by 4 to get 44. Each number to 10 is just duplicated.

The 11 Times Rule #2

1. Use this strategy for two digit numbers only.

2. Multiply 11 by 18. Jot down 1 and 8 with a space between it. 1 --8.

3. Add the 8 and the 1 and put that number in the middle: 198

Deck 'Em!

1. Use a deck of playing cards for a game of Multiplication War.

2. Initially, children may need the grid (below) to become quick at the answers.

3. Flip over the cards as though you are playing Snap.

4. The first one to say the fact based on the cards turned over (a four and a five = Say "20") gets

the cards.

5. The person to get all of the cards wins!

6. Children learn their facts much more quickly when playing this game on a regular basis.

Seeing the Patterns

1. Use a multiplication grid or let your students/children create one.

2. Look carefully at all of the patterns, especially when the numbers correspond with the facts e.g.,

7X8 and 8X7 = 56

3. Let students/children practice the 'fast adding' which is what multiplication is.

4. When students can count by 3s, 4s, 5s 6s, etc. they will automatically know their multiplication

tables.


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Dad's Eight Simple Rules for Mastering the Times Tables

Rule #1: You Times Me is the Same as Me Times You

This rule, more formally known as the reflexive property of multiplication, just means that A x B = B x

A. If you can teach your child that 6x7=42, they should be able to remember that 7x6=42 as well.

This should be the first question you ask if your child is stuck on a problem. If your child doesn't

know the answer to a multiplication math fact, swap the multiplicands and ask the question again.

When you factor in the effect of perfect squares, this one rule cuts the number of facts we need to

memorize almost in half to 55.

Rule #2: Any Number Times One is that Number.

If multiplication is just instructions for addition, multiplying a number by one just means to add a

single instance of that number up. The result is always that number. That takes 10 problems out of

our remaining list of facts, dropping us already to 45. See how fast we're moving?

Rule #3: To Multiply by Ten, Attach a Zero.

Even if concepts about place value and shifting decimal places are new at this point, memorizing that

multiplication by ten means just attaching a zero to the number is an easy rule to remember. The

zero on the end of the ten should serve as a trigger, "Ten ends in zero. What do you attach to theother number?" Given the focus on reusing addition facts in our multiplication odyssey, I

recommend avoiding the phrase "Add a zero" or you may garner some initial confusion.

Multiplication by ten removes nine more problems from the grid and gives us 36.

Rule #4: To Multiply by Two, Double the Number

This rule leverages facts learned during addition. 2x7 = 7+7 = 14. All of these facts should already be

memorized, but even if they're not they're still in the range where counting on fingers and toes gets

rapidly to a solution. Because we already crossed off 2x1 for Rule #2 and 2x10 for Rule #3, we only

get to knock eight more off our list, but that still drops us to 28.

Rule #5: Multiplying by Four is Doubling Twice (Double-Double Rule)

When my daughter pauses on a times-four problem, all I have to do is say "Double-Double" and the

answer comes right back. 4x6 = 6+6+6+6 = 12 + 12 = 24. For numbers five and lower, the four

double-double rule will work with addition math facts and should be performed in memory. If your

child can do simple two digit addition without regrouping in memory, six and seven work as well. It'lltake a while, but eventually 4x8 and 4x9 aren't too hard but you may find those facts get memorized


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before "carry the one" starts happening mentally. However you get there, we get to cross off seven

more facts (skipping 4x1, 4x2 and 4x10 from the rules above), which puts us at 21 left!

Rule #6: Multiplying by Five is Just Counting by Five

Your child should already know how to count by fives by the time they're in multiplication land, so a

quick short-cut for solving a 5 times problem is just to skip-count by fives up to the number. There's

other more complex strategies for fives (if the number is even, divide it by two and add a zero, so

8x5 = (8/2) * 10 = 40) but these are typically a bit complex when making a first pass here. The "Count

by Fives" rule drops us down to 16 remaining facts.

Rule #7: The Nine Rule - Tens is Number Minus One, Ones is Nine Minus Tens

When you multiply a number by nine, the sum of the digits of the result is always a multiple of nine.

For the basic math facts, the sum of the digits IS nine, and in fact it has some other interesting

properties. The tens place value is always one less than the number being multiplied, and because of

the nines rule the ones place is always the nine minus the value in the ten's place. The basic script

for learning this rule goes something like this: "Multiplying by nine? Okay, what's one minus the

other number? That's the ten's digit. Okay, what number plus that equals nine? That's the one's

digit." Again, this strategy just falls back on basic addition facts, and it cuts our total number of math

facts to memorize down to 10.

Rule #8: Memorize the Ten Remaining Facts

The first seven rules cut our list of facts down from 100 to 10, so all we need to do is memorize the

10 multiplication facts to have the whole table down. We eliminated any number times 0, 1, 2, 4, 5

and 9. So here's the multiplication facts that are left with a few rhymes to help remember them:

3 x 3 = 9

Three times three is so fine, three times three is nine.

3 x 6 = 18 Three times my bird ate six beans, three times six is eighteen.

3 x 7 = 21 Three candies each for seven days, that would be fun, three times seven is twenty-

one.

3 x 8 = 24 Three boys on skates fell on the floor, three times eight is twenty-four.

6 x 6 = 36 Six dogs with six sticks, six times six is thirty-six.

6 x 7 = 42 Sticks from heaven, stuck in glue, six times seven is forty-two!


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6 x 8 = 48 What do we appreciate? Six times eight is forty-eight!

Flight 6 Times 8! Don't be late! Leaving at gate 48!

7 x 7 = 49 Seven kids in seven lines, add 'em, up its forty-nine.

7 x 8 = 56 Five - six - seven - eight, Fifty-six is seven times eight.

7 packs of gum, each with 8 sticks. Can you chew fifty-six?

8 x 8 = 64 Eight times eight is sixty-four, close your mouth and shut the door!

Had two eights, dropped them on the floor, picked them up, had sixty-four.

The first four facts are all from the three-times table, and they're fairly easy to calculate using

addition or find by skip-counting by threes. The remaining six are the nasty ones. If you really look

back, you can probably remember struggling with one or more of the remaining ones as a kid. This is

a link to practice worksheets specifically for the 'Rule #8' facts here.

So that's it, multiplication in eight rules built on top of basic addition. If we count rule eight as ten

facts, it really means the whole multiplication table is wrapped up in only seventeen peices of

knowledge. Easy!


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Zero and One Times Tables :: Could This Get

Any Easier?

Check this out: if you multiply ANYTHINGby zero, the answer is zero. Anything. 4 x 0 = 0 and 1,000,000x 0 = 0. One times tables are almost as easy. Any number multiplied by one is always itself. "Huh," you

say? Well, check it out: 1 x 10 = 10, 1 x 42 = 42, 8,726 x 1 = 8,726. Simple, right?

Two Times Tables :: Double Your Pleasure

When you multiply a number by two, you just double that number. That's some pretty simplemath, even

for the most numerically challengedof us. So, if you want to figure out what 2 x 7 is, you just add 7 + 7 (the

answer is 14, by the way). Any number times two is the same as that number PLUSitself. Here's one more

example: 2 x 5 is the same as 5 + 5, which equals 10. Practice a couple -- it'sreally easy.

Four Times Tables :: Double, Double Trouble

OK, so now that you have the twos figured out, it's time to get doublingagain. This is not asconfusingas it

may sound. When you multiply four with anything, you have to use the doubling-up trick(that's the one

you used for the two times table) twice. Here's an example: 4 x 7 is the same as 7 + 7 = 14 and then 14 +

14 = 28. So 4 x 7 = 28. Here's another double, doubleexample: 4 x 10 is the same as 10 + 10 = 20, so

then 20 + 20 = 40. So the answer is 4 x 10 = 40.

Five Times Tables :: It's Why You HaveFingers

First things first - can you count to five?Yeah? Then you can figure out your five times tables. So, when

you want to multiply a number by five you just count up by fivesthat may times. Let's review how to count

by fives: 5, 10, 15, 20, 25... and so on. Got it? So if you want to multiply 5 x 7, you just count by fives,

seven times. 5, 10, 15, 20, 25, 30, 35. So 7 x 5 = 35. If you have trouble keeping track, just us eyour fingers.

Nine Times Tables - One Seriously Handy

Tip

Here is a fun (OK, "fun" is a relative term) way to remember your nine times tables. For this method you are

going to need to have two hands. Put your hands in front of you withyour palmstowards you. Your fingers

represent the numbers one to ten(one is your left thumb; ten is your right thumb). Now you're ready to do

your nine times tables. Let's say the question is 9 x 4. Count to the fourth finger(if you've counted right, it

will be the ring finger on your left hand) andcurlthat finger under. Now you have three fingers up before

that finger and 6 up after it. So the answer is 36. Let's try 9 x 8. Put down the 8th finger (middle finger on

the right hand) so that you have seven fingers up before the finger you curled under, and two fingers

afterward. So the answer is 72. If you're confused, check out the diagram at the top of this page on the

right. It'llclear things up.
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Ten Times Tables :: Just Add Zero and Stir

Here's anotherno-brainer.If you want to multiply something by 10, just add a zeroon the end. Here's an

example: 10 x 8 = 80 or 10 x 100 = 1,000. Try it with any number- from one to a billion. It's just too easy.

Eleven Times Tables :: Seeing Double

Here's another one that's aseasy as pie.Any number - up to nine - multiplied by 11 is itself written out

twice. Confused? Just check it out: 9 x 11 = 99, 4 x 11 = 44, 3 x 11 = 33 and so on.

* Hint *

Times tables work both ways(5 x 10 is the same as 10 x 5) so if you have the question 3 x 11, don't

stressthat there isn't a trick for the three times tables -- use the trickfor 11 instead!

Read more:Multiplication Times Tables Tips and Trickshttp://www.kidzworld.com/article/4107-tips-and-tricks-to-tame-

your-times-tables#ixzz31stbYNJ7

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The 9 Times Quickie