### Home > CC1 > Chapter 7 > Lesson 7.1.3 > Problem 7-34

7-34.

Compute each sum or difference. Homework Help ✎

Before adding or subtracting, change one or both fractions so that they have the same denominator.

Use a Giant One to convert to an equivalent fraction.

Find the lowest common denominator.

(3)(4) = 12

Convert the fraction(s).

Find the sum or difference.

Simplify, if necessary.

The lowest common denominator is 40.