12 Useful Math Tricks They Didn’t Teach You In School

math tricks 1

After finding these math hacks, I’m convinced that all those years of being forced to struggle through math class really was just a torture ploy created by evil math teachers everywhere. Check out these amazing math tips and you’ll agree! Watch out though, you may just unleash the inner math whiz you never knew was in you…

1. How To Convert Fahrenheit to Celsius

As if it was this simple all along…

math tricks 2

2. How To Multiply Large Numbers In Your Head 

Who knew?

math tricks 3

3. How To Multiply By 11

Finally! I can now multiply more than single digits by 11 in my head.

math tricks 4

4. Secret To Remembering The Numbers In Pi

Also a cool party trick.

math tricks 5

5. How To Find Fractions Of Whole Numbers 

math tricks 6

6. How To Figure Out What Day Of The Week Falls On What Date…

You might be confused looking at the picture below, but the math is actually quite simple (albeit a bit elaborate). You’ll need the codes HERE, which will help you master this.
July simply has a code of 5.
20th is 6 because 7 goes into 20 twice, which is 14. 20 – 14 = 6.
2069 is 2 because the leap year code of 2068 is 1 and 2069 is 1 year after, so that’s 2.
The math can be difficult at first because there are a lot of codes, but it works out incredibly well once you pick it up. Here’s a separate example:
January 3, 2014 is a Friday, right?
So, January, according to the table, is 6, and we handle days by using multiples of 7. We don’t need to, so it’s actually just 3 in this case. Next we need to know the closest leap year, which was 2012. That has a year code of 1 and 2013 is 2 years after, so 3 again.
We get 6 + 3 + 3 = 12 – 7 = 5! FRIDAY!

math tricks 7

7. How to Add And Subtract Fractions

math tricks 8

8. How To Figure Out Multiples Of Nine 

Just count up in the tens column and down in the ones column.

math tricks 9

9. How To Use Your Hands For 5, 6, and 9 Times Tables

math tricks 10
math tricks 11
math tricks 12
math tricks 13

10. How To Figure Out Percentages

math tricks 14

11. How To Remember Which Sign Is Greater Than and Which Is Less Than

Alligator always eats the bigger number!
math tricks 15

12. Use Lines To Multiply

math tricks 16


If you know someone who might like this, please click “Share!”

Do you like this story? Please give it a Like