You’re the mother of a schoolboy and still don’t know these secrets?

2017-10-09 15:10

You’re the mother of a schoolboy and still don’t know these secrets?
Read rather, it’s just incredible!

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For many, mathematics is like a dark forest, and seems to understand all this is simply impossible. But what if you look at it from a different angle? For example, to perceive mathematics not as something complicated and boring, but as an interesting puzzle. So we offer 10 math tricks that will transform your view of mathematics. This is not in any textbook!

Multiplication of numbers composed of units, themselves

Take this table into service, it is to solve such examples would be easy.

Method butterflies for adding and subtracting fractions

To understand this scheme very easily. In the selected example, multiply the numbers diagonally. If a fraction needs to be put the resulting numbers need to add, similarly, when you subtract. This will be our numerator. After multiply the number in the denominator — we have the answer!

The secret of multiplying numbers by 11

Imagine the following example: 63 * 11.

To solve it you just need to add up the numbers 6 + 3 = 9, and then put nine between six and three. Here’s our solution: 693.

But too early to relax, this is only half of what you need to know.

For example, here is an example: 85 * 11.

Despite the fact that 8 + 5 = 13, the answer is not 8135! As before, the number 3 is placed between the numbers 8 and 5, but 1 is added to figure 8 to obtain the correct answer 935.

Can I use this method for numbers with lots of digits? Of course!

Here is a little more complicated, but do not worry, you will succeed. For example: 13432 * 11 the answer will still start from 1 and end at 2, as well as 1 + 3 = 4; 3 + 4 = 7; 3 + 4 = 7 and 3 + 2 = 5, the answer is equal to 147752.

Find a fraction of an integer

Use this scheme and forget about the problems with fractions! This is the answer to the question of how to teach a child to solve mathematical examples.

Multiplied by 9 it is easier than you think!

This fun pattern will help you easily memorize the multiplication table for 9 forever.

Transform complex multiplication in simple examples

This trick is a little like magic. All you need is to take a multiplier of 100, and works to lay down and multiply. The sum deducted from 100, is the first part of the answer, and the product second.

And this is another way to multiply large numbers

Remember the PI is now not difficult

So you can easily find the percentage of the number

Now the math no longer seems so boring, right? Due to these stunts you can explain the math and make a decision interesting and fun!