Time to Get Back to Teaching Math

Bought a coffee & told girl I was givin' her change, but then I didn't have it.

She typed the wrong amount into her register and had no clue how much to give me back from $5.

She then asked an older coworker for a calculator. Really??

The woman did the math in her head in, oh, a second.

Here's an idea. How 'bout we go back to teachin' kids old skool math (before calculators).  Because new math apparently isn't workin'.  #learnhowtocountchange