# Surf for More Math

## Lesson 1 - Representing Numbers

To encourage students 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 students write number words and represent numbers using
numerals.

There are two ways to use Cookie Dough, spell
the words that makethe 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 students 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. Input the answer and click the
'Check' button to indicate if students have the correct answer.

Place
Value in Words and Numbers lets students 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. Input the answer and click
the 'Check' button to indicate if students have the correct answer.

Base
Blocks lets students 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 specifiedbase.