| A | B |
| To add or subtract fractions, you must have a | common denominator |
| When adding fractions, you add the tops and | copy the bottom |
| When subtracting fractions, you copy the bottom and | subtract the tops |
| ARF! stands for | Always Reduce Fractions! |
| An answer is not in simplest form unless you | reduce the fractions |
| When adding mixed numbers, you first | add the fractions |
| Sometimes, before we can subtract we need to | borrow |
| If you borrow from the whole number of a mixed number | add the bottom to the top of the fraction |