You are measuring a board so you can cut it. You need to cut the wood from 1-1-4 in. to 1-2 in. How long is the piece of wood you are going to cut?
The length of the piece of wood that you are going to cut is 1 inch and 1/4 inch plus 2 inches, which equals 1-1/4 inches plus 2 inches.
1-1/4 inches plus 2 inches can be written as the sum of fractions with a common denominator of 4:
1-1/4 inches plus 2 inches is equal to (1*4 + 1)/(4) + (2*4)/(4) = 5/4 + 8/4 = 13/4 inches.
Therefore, the length of the piece of wood that you are going to cut is 13/4 inches.