11 Math Hacks You Never Learned In School

4. Learn the Japanese method of multiplying by using lines

This method is much easier than doing the traditional method by hand

math hacks lines multiply

via: school-exercise-books | youtube

5. Convert Celsius to Fahrenheit quickly by multiplying by two and adding 30

math hacks convert thermonitor

via: reddit

6. Remember all of the numbers in pi by counting each word’s letters in this phrase

math hacks pi

via: 1000lifehacks