# Surf for More Math

## Chapter 3: Introducing Addition and Subtraction

**Lesson 10: Action Addition and Subtraction**

Use this interactive activity
to encourage students to have fun on the Web while learning about addition and subtraction.
Students can try this activity on their own or in pairs.

**Goal**

Model addition and subtraction situations.

[C, PS, R]

**Instructions for Use**

**Basic Addition Exercise** allows students to practice adding.

To use Basic Addition Exercises, count the bugs on the first leaf. Enter your answer in the first text box.

Count the bugs on the second leaf. Enter your answer in the second text box.

Then, count the bugs on the third leaf. Enter you answer in the third text box.

Click the "Next" button for a new addition question.

**Farm Addition** allows students to solve addition problems.

To play Farm Addition, look at the addition sentences involving chicks on a farm.

Click and drag the numbers from the top of the screen that complete the addition sentences.

**Basic Subtraction** models subtraction problems.

To start Basic Subtraction, look at the subtraction problem on the left and the shapes on the right that describe the situation.

To use Basic Subtraction, click the “Subtract” button. The shapes on the left will show the subtraction situation and the answer will move to the blank text box.

Click “Start New” to see a new subtraction problem.

**Using Subtraction** allows students to solve subtraction problems.

To start Using Subtraction, click the “Ready” arrow.

Look at the picture that represents a subtraction problem.

Type your answer to the problem in the blank text box.

Click the “Check” button to check you answer.

Click the arrow button to view another subtraction problem.

**A Day at the Beach** allows students to solve subtraction problems.

To use A Day at the Beach, look at the modeled subtraction problem and click on the number sentence that you can use to find the answer.

Click the arrow button and type your answer in the blank text box.

Click the arrow button again to view a new subtraction problem.