Exam 7: Subtraction of Common Fractions

Fractions must be expressed with common denominators before subtracting.

Find the thickness of a board 5/8 inch thick after 1/3 inch is planed off one side.

Subtract 2 1/4 inches from 4 3/4 inches.

Subtract 1/4 from 6.

Subtract 1/3 inch from 3/4 inch.

Subtract 1/4 from 3/4.

A countertop is laminated with 1/4 inch plastic. The total thickness is 1 1/2 inch. What is the thickness of the top without the laminate?

The thickness of a piece of three-ply wood is 3/4 inch. It was made by gluing 1/4 inch veneer to both faces of a core. Find the thickness of the core stock.

A rough board 2/3 inch wide has 1/3 inch taken off by planing on one edge. What is its width?

To subtract a fraction from a whole number or a mixed number, express the whole number as an improper fraction, with a denominator common to the denominator of the fraction.