11 Math Hacks You Never Learned In School

1. Instantly know how to multiply figures of 9 by remembering this chart

math hacks tables of 9

via: pinterest

2. Figure out percentages quickly by using this method

This can come in handy in the store!

math hacks percentages

via: twitter

3. Have trouble remembering which sign is for greater than and which is for less than? Remember the crocodile mouth

math hacks greater than

via: ducksters