# Surf for More Math

## Lesson 2 - Renaming Numbers

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

**Goal **

Represent and rename 3-digit numbers with numerals
and words, models, and drawings.

**Builds Upon **

Student Book pages 28-29

**Instructions for Use **

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 specified
base.

Place
Value of 3-Digit Numbers lets students model 3-digit numbers.

To use Place Value of 3-Digit Numbers , click the 'Start' button and
a number appears in the text field. Determine the place value for each
digit in the text fields. Click 'Check Answer' to see if the answer
is correct.

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. Have you child input the
answer and click the 'Check' button to indicate if students have the
correct answer.