Tricks to master Math
If you are bad at math, it’s not your fault entirely.
We were simply not taught in school as it should, because mathematical tricks with which any calculations become elementary are easier to remember.
Multiplication of large numbers in the mind, How to learn the multiplication table by 9, Butterfly method for adding and subtracting fractions, Multiplying numbers by 11 (using the example of 32), How to remember Pi, How to find the percentage of a number, How to find a fraction of an integer, Conversion of degrees Fahrenheit to degrees Celsius, Fast squaring, Multiplication by 5, Multiplication by 11, Multiplication by 4, Complex multiplication, Division by 5, Subtraction from 1000
Multiplication of large numbers in the mind
How to learn multiplication table by 9
Butterfly method for adding and subtracting fractions
Multiplication of numbers by 11 (for example, the number 32)
How to remember the number of pi
How to find the percentage of the number
How to find a fraction from an integer
Conversion of degrees Fahrenheit to degrees Celsius
This technique will help to quickly square a two-digit number, which ends by 5. Multiply the first digit by itself + 1, and add 25 at the end. That's all!
Multiplication by 5
Divide the number by 2. If the result is an integer, add a 0 at the end. If not, ignore the comma and add 5 at the end.
Multiplication by 11
Multiplication by 4
If you need to leave a 15% tip, there is an easy way to determine how much it is. Calculate 10% (divide the number by 10), and then add the resulting number to its half and get the answer.
If you need to multiply large numbers, and one of them is even, you can simply regroup them to get the answer.
Division by 5
In fact, it’s very easy to divide large numbers by 5. All you need is to simply multiply by 2 and move the comma.
Subtract from 1000
To perform a subtraction from 1000, you can use this simple rule: subtract from 9 all digits except the last, and subtract the last digit from 10.