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With this Platform Scale game you will weigh characters as they jump onto the scale.

There are two number bars on the platform scale. The lower bar has a units number line and the top bar has a tenths number line. The units number line has tenths marks. The tenths number line has hundredths marks.

The pointer on each number line can slide by dragging with the mouse.

You can also move the tenths pointer by pressing the right or left arrow keys.

The Bar Weight window will tell you the weight you have selected by moveng the pointers.

Experiment with the number line pointers with numbers from 0 to 5, such as 2.62. Notice that the tenths pointer moves ten times faster that the units pointer.

After pressing the <Start> button, one of the characters will jump onto the scale. The number bars will rotate after the character jumps onto the platform. You are to move the bar sliders so that the number bars are level. The red pointer on the units number bar will point to the center mark on the scale when the correct weight is found.

You will be assisted by the words "higher" and "lower" in the messages window. If "higher", move the bar sliders to the right and if lower, move the bar sliders to the left. When the correct character weight is found, the word "correct" will appear in the message box.

It is suggested that you move the pointer with the mouse first and when the number bars are close to level, use the left or right arrow keys to move thetenths bar pointer to find the exact weight.

Practice moving the units bar and the tenths bar with a combination of mouse and arrow keys.

You will be timed. After weighing 10 characters you will be given a score that tells you the number of characters you can weigh in a minute. Try to weigh at least 3 characters per minute. To be an expert, you should weigh at least 5 characters per minute.

The different weight ranges for each character are:

Chimp 2 to 3 units

Rabbit 1 to 1.5 units

Bird 0.50 to 0.75 units

Blinker 0.30 to 0.40 units

Beetle 0.20 to 0.30 units

bee 0.05 to 0.08 units

Have fun.


  1. The relative distances of units, tenths, hundredths, and thousandths along a decimal number lines.
  2. Units on the tenths number line are 1/10 the size of units on the units number line.
  3. The decimal number line is dense. There are ten sections between any two points on the decimal number line.