Mathematics 3

# Surf for More Math

## Lesson 1 - Representing Numbers

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

### Goal

Represent numbers using numerals, number words, models, and drawings.

### Builds Upon

Student Book pages 26-27

### Instructions for Use

Cookie Dough helps your child write number words and represent numbers using numerals.

There are two ways to use Cookie Dough, spell the words that make the number, or type the digits from the written words on the cheque.

To spell the words that make the number, look at the number of cookies on the cheque, and type the number words into the text field. Click the 'Sign It!' button.

To type the digits from the written words on the cheque, enter the numbers into the text field. Click the 'Sign It!' button. Check to see if you answered correctly.   The answer and your score will be displayed at the top of the page.

Expanded Form helps your child write a number that shows the value of each digit.

To use Expanded Form, click the 'Start' button and an expanded form number appears in the first text field. Have your child input the answer and click the 'Check' button to indicate if your child has the correct answer.

Place Value in Words and Numbers lets your child practice representing numbers using words.

To use Place Value in Words and Numbers, click the 'Start' button and number words appear in the first text field. Have your child input the answer and click the 'Check' button to indicate if your child has the correct answer.

Base Blocks lets your child represent numbers using a model.

To use Base Blocks, click on the blue icons at the top of each column to enter units or blocks. The number of blocks added to the work area automatically updates at the left of the workspace. If base blocks are moved into the wrong column, or if there are too many blocks in a column to represent a number, then the number update at the left remains blank. It reappears when changes are made that define a number.

Exchange pieces by dragging a base block one column to the right; it breaks apart to show that an exchange was made. To group pieces to make an exchange in the other direction, click and hold the mouse key down while dragging a rectangle to lasso the pieces. The newly grouped object can then be dragged into the next column.

Click on the 'Show Problem' button to start an exercise in the specified base.