Subtract 1- or 2-digit number from a 2-digit number with/without renaming
How many kids in school have done their homework? Again this can be answered in several ways: in percentages, 70%; or in ratio, 7:10; Both of these mean out of ten kids in class there are seven good ones who did and three not-so-good ones who didn't. The bottom line is that kids learn math much better when it makes sense.
Or you can usually find textbooks and workbooks at the public library, where you can also copy any worksheets that you want to use.
How much money do I have left if I buy a soda? By the end of the week, how much of my daily allowance will I be able to save if I don't?