12 Useful Math Hacks You Didn’t Learn At School

Mathematics is one subject that is a headache for many of us at school. It was a constant source of terror especially during exam days. Mathematics teachers seemed like ruthless terrorists, ever ready to hurl a piece of their mind for every multiplication or division mistake that you made. Going through these simple yet efficient math hacks would make you want to go back in time and improve your grades. Well, that’s not really feasible but these hacks would surely help quicken your calculation-speed the next time if you came across one.

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…

01. How to Add And Subtract Fractions

$12 Useful Math Hacks You Didn't Learn At School-Butterfly Method to Add And Subtract Fractions$

Image: ayounes

02.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. 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!

$12 Useful Math Hacks You Didn't Learn At School-Calculate Your Calendar$