Mathematics 4

# Lesson 2 - Square Centimetres

To encourage students to have fun on the Web while learning about Square Centimetres, here are some games and interactive activities they can do on their own or in pairs.

### Goal

Estimate, measure, and compare area using square centimetres.

### Builds Upon

Student Book pages 214-216

### Instructions for Use

Area is a problem-solving activity.

To find the Area, children can read and attempt to solve the questions. Step-by-step answers to the questions are obtained by clicking on the "Let's Practice!" link at the bottom of the Web page.

The Comparison Estimator provides your students with opportunities to practice estimation skills. Your child can compare the area of two shapes by estimating.

To use the Comparison Estimator, set the problem type to 'Area". Click 'Hint' to show the grid. To answer a question, choose an item from the pull-down menu that best completes the sentence - "greater than," "less than," or "almost the same as." If you choose "almost the same as," the two shapes must be within 5% (either above or below) of the actual answer. Click the ' Check Answer' button to see if it is correct. Try the next question.

Square Units prompts students to find the area of a square of rectangle.

Use Square Units to practice measuring length and area. To measure length, select a unit such as a centimeter to see how many are needed to measure a given segment. To measure area, select a unit such as a square centimeter to see how many are required to measure the given area.

Drag points B or D to change the dimensions of the rectangle.