Last time, a presenter presented at our school about their mathematics tuition. In the presentation, he taught us a trick to make our division a piece of cake. (Sorry I forgot to post this earlier 🙂 )

**However**, this trick can **only** be used when a number is **divided by five**.

**Instead** of doing the ‘hard’ way (‘/’ means divide),

40 / 5 = 8

you do the **easy** way:

First multiply 40 by 2:

40 x 2 = 80.

The answer is 80, right?

Now, you **take away** the 0.

8

It becomes 8, and that’s the answer.

Isn’t that simple?

**But if the number doesn’t end in 0…**

41 x 2 = 82

You put a decimal before the last digit.

8.2

That’s the correct answer, right?

Now, this could be** useful** when dividing **biiiig **numbers, such as 192123789.

192123789 / 5 = ?

Well, that looks hard, doesn’t it?

It doesn’t?

**But** it will take **more time**.

If you use this method, it would be **quicker**.

x192123789

x 2

x38424757.8

If you **don’t like multiplication**, simply do this way:

+ 192123789

+ 192123789

+38424757.8

I hope you will find this information helpful. 🙂

Great tips on how to teach children to do matt. I am a first time Mom. You blog is going to be very useful for me in years to come 🙂

Thank You,

Giovanna Garcia

Good, I have similar post in my blog about quick mathematics calculation. If this useful trick does exist in my school time, how good it is.

.-= Simon Liew´s last blog ..Instant Multiplication (Part 1) =-.