# Surf for More Math

## CHAPTER 1: NUMBER RELATIONSHIPS

**Lesson 4: Estimating Square Roots **

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

**Goal**

Estimate the square root of a numbers that are not perfect squares.

**Builds Upon**

Student Book pages 16–20

**Instructions for Use**

**Square Root Calculator** will find the square root of the number you enter.

Enter a number that is not a perfect square. Before you click “Calculate” estimate what you think is the square root of that number. Is your estimated answer close to the actual answer?

**Relationsip Between Square and Square Roots** allows students to review how to find the square root and perfect square of a number.

Follow the instructions and explore squares and square roots. You will see a step-by-step process for squaring, and two examples for how to estimate the square root.