# Surf for More Math

## Lesson 2 - Adding and Subtracting Tens

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

**Goal **

Add and subtract tens.

**Builds Upon **

Student Book pages 82-83

**Instructions for Use **

Adding
Tens lets students practice adding tens.

To use Adding Tens, click the 'Start Addition' button and read the
equation in the first text field. Have students input the answer in
the text field and click the 'Check' button to indicate if students
have the correct answer.

Subtracting
Tens lets students practice subtracting tens.

To use Subtracting Tens, click the 'Start' button and read the equation
in the first text field. Have students input the answer in the text
field and click the 'Check' button to indicate if students have the
correct answer.