Math Trick

Sometimes, students find it difficult to do the math. To overcome this, a teacher must be able to find an alternative learning process so as not boring. This is commonly called a mathematical trick. Mathematical trick facilitate students perform operations of addition, subtraction, multiplication, or division in a way easier, faster, and interesting.

Multiply Up to 20X20 In Your Head

In just FIVE minutes you should learn to quickly multiply up to 20×20 in your head.  With this trick, you will be able to multiply any two numbers from 11 to 19 in your head quickly, without the use of a calculator.

I will assume that you know your multiplication table reasonably well up to 10×10.

Try this:

• Take 15 x 13 for an example.
• Always place the larger number of the two on top in your mind.
• Then draw the shape of Africa mentally so it covers the 15 and the 3 from the 13 below. Those covered numbers are all you need.
• First add 15 + 3 = 18
• Add a zero behind it (multiply by 10) to get 180.
• Multiply the covered lower 3 x the single digit above it the “5” (3×5= 15)
• Add 180 + 15 = 195.

That is It! Wasn’t that easy? Practice it on paper first!

I have another Math Trick that you can apply at any number

Multiply Decimal Number with fun way

For example

Step:

1. draw the corresponding column of numbers first

2. drawing lines correspond many second rate

3. draw a dividing point in the figure

4. draw a diagonal line on each intersection of columns and rows

5. add up the numbers diagonally

6. then united two points of decimal number

Multiplication of number with fast way

For example

With this trick you can multiply of any number just in one line.

Step:

1. multiplying the number of final
2. multiplying the second number from the back
3. multiplying the third number from the back
4. then add the results

for more details you can download here