Some Important Tricks of Mathematics

Here are some important tricks of mathematics:

Multiply by 11: To multiply any two-digit number by 11, simply add the digits together and place the sum in the middle. For example, to find the product of 47 and 11, add 4 + 7 = 11 and place the 1 in the middle to get 517.

Multiply by 9: To multiply any number by 9, simply multiply by 10 and subtract the original number. For example, to find the product of 6 and 9, multiply 6 by 10 to get 60, and then subtract 6 to get 54.

Multiply by 5: To multiply any number by 5, simply divide by 2 and then multiply by 10. For example, to find the product of 32 and 5, divide 32 by 2 to get 16, and then multiply by 10 to get 160.

Square a two-digit number ending in 5: To square any two-digit number ending in 5, simply multiply the first digit by itself plus 1, and then add 25 to the end. For example, to find the square of 35, multiply 3 by 4 to get 12, and then add 25 to get 1225.

Divide by 5: To divide any number by 5, simply multiply by 2 and then move the decimal point one place to the left. For example, to divide 68 by 5, multiply 68 by 2 to get 136, and then move the decimal point to get 13.6.

Multiply by 2: To multiply any number by 2, simply double the number. For example, to find the product of 8 and 2, double 8 to get 16.

Multiply by 10: To multiply any number by 10, simply add a zero to the end of the number. For example, to find the product of 7 and 10, add a zero to 7 to get 70.

These tricks can help simplify calculations and make math more manageable and fun