Introduction to Adding and Subtracting Fractions With Common Denominators

What you’ll learn to do: Add and subtract fractions with common denominators

A classroom with a teacher standing in front of a chalkboard with math problems written on it, while students watch him

What fraction of students did well on the latest test?

In math class, Mike’s teacher shares that [latex]\Large\frac{1}{8}[/latex] of the students received an A on the latest test and 3/8 of the students received a B. Mike wants to figure out what fraction of the class got either an A or B on the test. To do this, he’ll have to add fractions. In this section, we’ll use models to explore how to add and subtract fractions with common denominators.

Before you get started, take this readiness quiz.

readiness quiz

1)

If you missed this problem, review this video.

2)

Draw a model of the fraction [latex]\Large\frac{3}{4}[/latex].

If you missed this problem, review this video.

3)

If you missed this problem, review this video.