# Surf for More Math

## CHAPTER 3: ADDING AND SUBTRACTING DECIMALS

**Lesson 1: Estimating **Whole Number Sums and Differences

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

**Goal**

Estimate sums and differences to solve problems.

**Builds Upon**

Student Book pages 82–85

**Instructions for Use**

**Adding and Subtracting Whole Numbers and Decimals** allows students to solve various types of questions involving adding and subtracting whole numbers and decimals.

Play this game like jeopardy. Select a category and point value and then answer the question.

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