12 Smart Math Tips for Kids
If you want to calculate faster, you should definitely know these little tips.
1. The quickest way to calculate the percentage of a number
2. To find the square of a two-digit number ending in 5, multiply the first digit by the result of the number itself and add 1. Then, add 25 to the end of the resulting number to get the squared result.
3. Rules for finding the result when multiplying by 9
4. The quickest way to multiply by 5: First, divide the number by 2. If the result is an integer, add a zero to the end. If the result is not an integer, ignore the decimal part and just add 5 to the end.
5. The quickest way to calculate the result when multiplying a number by 11.
6. Multiplication by 4: A simple trick is to multiply the number by 2 and then multiply by 2 again.
7. Tip: If you need to calculate 15% of a number, take the result of 10% of that number and add it to the result of 10% divided by 2.
8. If you need to multiply large even numbers together, mentally calculate them separately to make the calculation easier.
9. To divide a large number by 5, multiply that number by 2 and then move the decimal point one number forward.
10. The fastest way to subtract numbers with multiple zeros.
11. Tips for converting Fahrenheit to Celsius and vice versa.
12. How to calculate the cube root of a large number without a calculator
