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Surf for More Math

Lesson 2 - Reading and Writing Numbers


Use the following interactive activities to encourage students to have fun on the Web while learning about reading and writing numbers. Students can try these activities on their own or in pairs.


Read, write, and model five-digit numbers.


Builds Upon

Student Book pages 28-30

Instructions for Use

Base Ten Blocks lets students model numbers using base ten blocks.

To use Base Ten Blocks, click on the blue icons at the top of each column to add base ten blocks. When you add blocks to the work area, the total number automatically updates in the area to the left of the workspace.

Drag a base ten block one column to the right. The base ten block breaks apart to show how the smaller blocks were grouped to create the larger block. To group blocks to create a larger block, click and hold down the mouse while dragging a rectangle to lasso the blocks. When you have selected the correct number of blocks, the blocks will join together to create the larger block. The newly grouped block can then be dragged into the column to the left.

If base ten blocks are moved into the wrong column, or if there are too many blocks in a column to represent a number, then the area to the left of the workspace does not display a number. The number reappears when the blocks are rearranged to define a number correctly.

Click the "Show Problem" button to start an exercise. Group blocks that can be combined to create a larger unit and move the blocks into the correct columns. When you have represented the number correctly, the number will appear in the area to the left of the workspace.


Place Value - Expanded Form lets students practice recognizing numbers in expanded form.

To use Place Value - Expanded Form, scroll down and click the "Start" button. A number in expanded form appears. Input the answer in the text box beside the "Check" button, and then click the "Check" button to check your answer.


Identifying Place Value helps students identify the place value of large numbers.

To use Identifying Place Value, scroll down and click the "Start" button. Click on the numbers that represent each place value for the larger number. Click the "Check Answer" button to check you answer.