# Surf for More Math

## Lesson 2 - Adding and Subtracting Tens

To encourage your child 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 you child practice adding tens.

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

Subtracting
Tens lets you child practice subtracting tens.

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