Pen has 1/2 cup and 1/8 cup measuring cups. what are two ways he could measure out 1 3/4 cups of flour.

There are numerous ways he could do this, but for example, let's take two ways which are common:

1) He could take the 1/2 cup twice which equals 1, and then he could measure 6 of 1/8 cups which would be 6/8 or 3/4. 

2) Way number two could be if he took the 1/2 four times, which would give him 2, and then he could remove 2 1/8 cups out of the 2 which would give him 1 3/4.