Exam 6: Subtraction of Common Fractions

An engine specialist works 1 1/8 hours on one car, 3 3/8 hours on another car, and 2 1/4 hours on a third car. How much time remains for another job in an 8-hour working day?

A lockwasher has an 11/32-inch inside diameter and a bolt has a diameter of 1/4-inch? What is the difference in diameters?

The lockwasher used on a 3/8-inch bolt has a 17/64-inch inside diameter and a 3/4-inch outside diameter. What is the difference in inches between the inside and outside diameters?

What is the length of the short end on an automobile leaf spring if the complete spring is 24 inches long and the long end is 18 1/8 inches?

A truck has an overall length of 15 1/8 meters. A garage is 23 meters long inside. How many meters of clearance space are left if a bench 2 meters wide is placed in front of the truck?

3/4 - 5/16 = ____________________/16.

6 - 3 1/4 = 2 ____________________/4.

A mechanic needs an axle shaft key 1/4 inch square. The only available piece of key stock measures 1/4 inch x 5/8 inch. How many inches of stock have to be removed to bring it to proper size?

8 7/8 - 6 1/4 = 2 ____________________/8.

The outside diameter of a hose is 2 1/2 inches, and the wall is 5/32 inch thick. How large, in inches, is the inside diameter.?