Saturday, February 20, 2010

Mathematics Link..

--> link di atas memang seronok. Dapat menambahkan pengetahuan dan pembelajaran yang baru.

Multiplication Table

How to Learn
Your life will be a lot easier when you can simply remember the multiplication tables. So ... train your memory! First, use the table above to start putting the answers into your memory.Then use the Math Trainer - Multiplication to train your memory, it is
specially designed to help you memorize the tables.

Use it a few times a day for about 5 minutes each, and you will learn your tables.

Try it now, and then come back and read some more ...

So, the two main ways for you to learn the multiplication table are:
1.) Reading over the table
2.) Exercising using the Math Trainer

But here are some special "tips" to help you even more:

Tip 1: Order Does Not Matter

When you multiply two numbers, it does not matter which isfirst or second, the answer is always the same.
Example: 3×5=15, and 5×3=15
Another Example: 2×9=18, and 9×2=18
In fact, it is like half of the table is a mirror image of the other!
So, don't memorise both "3×5" and "5×3", just memorise that "a 3 and a 5 make 15" when multiplied.
This is very important! It nearly cuts the whole job in half.

In your mind you should think of 3 and 5 "together" making 15.
so you should be thinking something like this:

Tip 2: Learn the Tables in "Chunks"

It is too hard to put the whole table into your memory at once. So, learn it in "chunks" ...

A -->Start by learning the 5 times table.

B -->Then learn up to 9 times 5.

C -->Is the same as B, except the questions are the other way around. Learn it too.

D --> Lastly learn the "6×6 to 9×9" chunk

Then bring it all together by practicing the whole "10 Times Table"
And you have learnt your 10 Times Table!
(We look at the 12x table below)

Some Patterns
There are some patterns which can help you remember:
2× is just doubling the number. The same as adding the number to itself.
2×2=4, 2×3=6, 2×4=8, etc.

So the pattern is 2, 4, 6, 8, 10, 12, 14, 16, 18, 20
(And once you remember those, you also know 3×2, 4×2, 5×2, etc., right?)
5× has a pattern: 5, 10, 15, 20, etc. It always end in either a 0 or a 5.
10× is maybe the easiest of them all ... just put a zero after it
10×2=20, 10×3=30, 10×4=40, etc.
9× has a pattern, too: 9, 18, 27, 36, 45, 54, 63, 72, 81, 90

Now, notice how the "units" place goes down: 9,8,7,6, ...? And at the same time, the "tens" place goes up: 1,2,3,...?

You can use this pattern to prompt your memory this way: the tens place will be 1 less than what you are multiplying by!

Example: 9×7 ... go 1 less than 7, so the tens place is 6, and then remember 63