You have that slide rule in the back of the closet. Maybe it was from your college days. Maybe it was your Dad’s. Honestly.

Understand how to express the same number in different forms. Part of using base-ten numbers correctly is understanding how to express the same number in different forms. It is challenging to move ...

Most of us have little trouble working out how many millilitres are in 2.4 litres of water (it’s 2,400). But the same can’t ...