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Showing posts with label Math. Show all posts
Showing posts with label Math. Show all posts

Dec 29, 2011

2 digit multiplication trick under 20

5:05 PM – by 0
schoolash.blog - Can you calculate the multiplication below each within 5 seconds without using a calculator?

18 x 12

12 x 17

16 x 18

13 x 17

You do was wonder if all the above calculations can be completed each within 5 seconds.

This is not magic but we can do so by the following process:

An easy way to memorize basic multiplication

4:59 PM – by 0
schoolash.blog - Children must have still felt the difficulty of memorizing basic multiplication which totals nearly 100.

There is a simple technique if oblivious to the basic multiplication.

Following methods:

Suppose we want to know what is the value of multiplying 7 x 8

Fill in the circle below the number 7 from the reduction of 10 -7 is 3. Fill in the circle below the number 8 from the reduction of 10-8 which is 2.

7 x 8 multiplication result can be searched in the following ways:
The first digit reductions obtained from 7 - the circle into two namely 7-2
or can be obtained from the first digit reduction in 8 - circle one that is 8-3

The results of both must be the same ie 5

The second digit multiplication value obtained from circle 1 to circle 2 is 3 x 2

So when combined with the first digit to 2 digits will be obtained 56

Mar 30, 2011

Teach first grade with fingers Math

3:56 PM – by 0

This school job I get after I get a ration of low-class teaching. because a teacher would want students that being smart, especially in math. 

After my long search for a book about mathematics finger, a book that teaches us about how to use the fingers in counting ...  

I use it quite fun, so students will not get bored like when we talk. .. for more details, you do not bother buying the book. simply download the instructions HERE ......
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