Do not depend on a calculator to do your thinking for you. If you have basic (8th grade or better) math in your head, you have a treasure that no one can take away from you, and you're much less likely to be cheated by those who want your money. Here's a hint: everyone wants your money.
Math is something you can use, every day. It's everywhere in your home, your car, your work, your play.
How do you halve or double a recipe without knowing math?
How do you figure the square yardage to buy carpet for your room without knowing math?
How do you calculate if the smaller or larger jar of peanut butter is a better deal without knowing math?
How do you balance (and not overdraw) your checkbook without knowing math?
How do you figure out how many miles per gallon your car gets without knowing math?
How do you figure out a baseball player's batting average without knowing math?
In what ways are you using your treasure today?