When he showed his son how to solve math problems he was - Daily Jumble Answer

When he showed his son how to solve math problems he was

The answer is "FATHER FIGURING"

Jumble is a word puzzle game. You get mixed-up letters, and you try to make a real word from them. It's a fun and tricky game that checks your word knowledge. You can find Jumble puzzles in newspapers and books. If you need help with one, just ask!