Adding and subtracting fractions with unlike denominators

4 videos
3 skills
Learn how to add and subtract fractions that have different denominators.

Adding fractions with unlike denominators

VIDEO 7:24 minutes
Learn how to add fractions like 3/4 and 1/5. Key idea: We must rewrite the fractions to have a common denominator before adding them.

Adding fractions with unlike denominators

PRACTICE PROBLEMS
Practice adding fractions that have different denominators.

Subtracting fractions with unlike denominators

VIDEO 5:01 minutes
Learn how to subtract fractions like 4/3 and 1/5. Key idea: We must rewrite the fractions to have a common denominator before subtracting them.

Subtracting fractions with unlike denominators

PRACTICE PROBLEMS
Practice subtracting fractions that have different denominators.

Adding and subtracting multiple fractions with unlike denominators

VIDEO 5:23 minutes
Sal solves 1/4 + 3/5 - 3/10 by first rewriting each fraction to have a common denominator.

Solving for the missing fraction

VIDEO 5:40 minutes
Learn how to solve missing fraction problems like __ + 1/16 = 3/2.

Adding and subtracting fractions challenge

PRACTICE PROBLEMS
Challenge problems involving adding and subtracting fractions that have unlike denominators.