# Surf for More Math

## Chapter 8: Addition and Subtraction Strategies

**Lesson 5: Adding Doubles **

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

**Goal**

Recognize doubles facts.

[CN, V]

**Instructions for Use**

**Bridge Doubles** allows students to practice adding doubles.

Look at the number. If that number is doubled what is the sum? Click on your answer to help build the bridge. Click “Next” to try another question.

**Flower Power** allows students to solve related addition and subtraction sentences.

Students will be shown a fact family of doubles. Students will complete both the addition sentence and the subtraction sentence. If the student gets the correct answer, they will earn a petal on their flower.