Math Tricks

Just for fun, check out these 11 easy math tricks. Some of them I knew (like how to calculate a 15% tip easily), and most of the others were new. Here's an example:

If you have a large number to multiply and one of the numbers is even, you can easily subdivide to get to the answer:

32 x 125, is the same as:
16 x 250 is the same as:
8 x 500 is the same as:
4 x 1000 = 4,000