• In the above figure you see a number line, positioned horizontally. It shows numbers x in the range -3 < x < 3.

• Click and drag on the red pointer. The position of the pointer, to the nearest hundredth, is shown next to it.

• Click on the dark dot to zoom in near the position of the pointer. Click on the ring outside the dot to zoom out. Note how the numbers on the numberline change.

• Click the left or right arrow to move along the number line.

• Try using the control pad to locate the following numbers.

- 1.23456 Hint: figure out a method that uses only the zoom-in dot and the right arrow.
- -.00123456
- 987654.32
- -.09876543