Mathematics 1

# Surf for More Math

## Lesson 8 - How Many Cubes Are There?

To encourage students to have fun on the Web while learning about How Many Cubes Are There?, here are some games and interactive activities they can do on their own or in pairs.

### Goals

Estimate quantity and check by grouping and counting.

Model numbers grouped in 10s and 1s.

### Instructions for Use

Connecting Cubes lets students model numbers grouped in 10s and 1s.

To use Connecting Cubes, click on the "Connecting Cubes" link, and then click on the stamp. Select the colour of cube to put on the workspace. Click on it. To connect cubes, click on the hand icon and then click on the cubes to be connected. To disconnect cubes, click on the cubes with a lightning bolt icon and then click on the cubes to be disconnected. To erase cubes, click on the eraser. To clear the workmat, click on the broom.

Bongo Blocks prompts students to model numbers using tens and ones blocks.

To use Bongo Blocks, click on the ones, or tens buttons to the left of the screen to make a number appear. Have students drag and drop the correct number of blocks.

Base Block Addition lets students practice adding numbers using tens and ones blocks.

To use Base Block Addition, drag a base block into a column to the left. If students move a block one column to the right, it breaks apart to show the exchange, for example, a 10-long for ten units. To group pieces to exchange 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.

To complete a preset addition problem, select base 10 and click on the "Next Problem" button. Group any pieces and drag them into the next column. Start with the 1s column and work to the 10s column. The addition solution will appear on the left.

To add the blocks together to create your own problem, click on the "Create Problem" button and then use the blue buttons at the top to enter blocks above and below the dashed line. As long as there are two numbers correctly represented in the specified base, the addition problem will appear on the left. To solve it, click on the "Begin Problem" button and then on any of the blocks in the workspace.