Question

You spend `1/2` of your allowance each week on school lunches. Each lunch cost $1.25. How much is your weekly allowance?

Answer 1

`$2.50`

Explanation:

If you spend `1/2` of your allowance each week on school lunches, keep in mind first that `1/2+1/2=1`. One of those `1/2` is the $1.25 for school lunches. Which means that we have another $1.25 that we get to do something else with.

All told, our weekly allowance is:

`$1.25+$1.25=$2.50`