# Subtracting Mixed Numbers

Find each difference. Simplify if possible.

11. In which of the exercises above do you have to rename
the first

mixed number to show more fractional parts before subtracting?

The table at the right shows the lengths

of various

**carpentry nails.
**

12. How much longer is a 30d nail

than a 5d nail?

13. How much longer is a 12d nail than a 9d nail?

**Test Prep
**14. To subtract from
, which of the following must the mixed

number first be renamed as?

15. Writing in Math Jack says that once you have a common

denominator you are ready to subtract two mixed numbers.

What other step might be necessary before you can subtract?

Give an example.