# Surf for More Math

## Lesson 8 - Adding and Subtracting Using Equivalent Fractions

To encourage students to have fun on the Web while learning about Adding
and Subtracting Using Equivalent Fractions, here are some games and
interactive activities they can do on their own or in pairs.

### Goal

Develop a method to add and subtract fractions without using models.

### Builds Upon

Student Book pages 334-336

**Instructions for Use**

Adding
Fractions Calculator prompts students to change unlike fractions
to equivalent fractions and add.

To use Adding Fractions Calculator input numerators
and denominator in the "Add two fractions" column. Click the
"Add" button. Read the explanation of the strategy.

Subtracting
Unlike Fractions prompts students to change unlike fractions to
equivalent fractions and subtract.

To use Subtracting Unlike Fractions, click the "New Problem"
button. Input the common denominator of both fractions. Find the equivalent
numerators. Press "Enter" to find the difference.