7 Math Tricks to Help You in Everyday Situations

Some people have a few tricks up their sleeve to make everyday life easier, like how to quickly multiply 2-digit numbers. We at 5-Minute Crafts would like to show you how some of our favorite math tricks work.

1. Multiply a 2-digit number by 11.

Add the 2 numbers, then add the result in between.

Note: There are also cases where you need to carry the 1, as in 57×11 = 627. The process behind it is 5 + 7 = 12, and the 1 will be added to the 5.

2. Get 20% from a number.

Multiply the number by 20, and simply divide the result by 100.

3. Multiplication made easy

If you do multiplication by tens, it becomes a bit easier. Break up your number in tens, plus the remaining number, then follow the distributive property shown above.

4. Divide by 10, 100, and 1000

When dividing a number by 10, move the decimal one point to the left. If dividing by 100, move it 2 spots to the left; and by 1,000, 3 spots to the left.

5. Multiply a 2-digit number by 5.

For even numbers, divide them by 2 and then multiply them by 10, or simply add a 0 at the end. As for odd numbers, they’ll have 1 remainder when you do this. Add it at the end, and it’ll become a 5.

6. Multiplying by 9

First, you’ll need to subtract 1 from the number you want to multiply. Then subtract the result from the number 9. Finally, the result will be the junction of these 2 numbers.

7. Add 2-digit numbers quickly.

Simply split the numbers into tens and ones. Then add them on their own (tens with tens, ones with ones). To finish up, simply add both results.

Share This Article