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With this Siding Scale Game you will weigh characters as they jump onto the scale.

You will use the three number lines on the sliding scale. The lower bar has a units number line. The middle bar has a tenths number line, and the top bar has a hundredths number line. The units number line has tenths marks. The tenths number line has hundredths marks. The hundredths number line has thousandths marks.

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

You can also move the hundredths slide by pressing the right or left arrow keys.

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

Experiment with the number line pointers with numbers from 0 to 5, such as 2.625. Notice that the tenths slide moves ten times faster that the units slide and the hundredths slide moves ten times faster than the tenths slide.

Chimp weighs 1 unit, Rabbit weighs1/2 units, Blinker weighs 1/4 units, the bird weighs 1/5 units, the beetle weighs 1/8 units, the bee weighs 1/10 units, and the butterfly weighs 1/20 units.

After pressing the <Start> button, one of the characters will jump onto the scale. The fraction weight will be given when the character jumps. Move the sliders until you reach the correct decimal equivalent.

The message window will tell you if you have to move to the right (if higher) or to the left (if lower). The units bar will rotate as you move the slides. The bar will rotate clockwise as the measured weight increases. Try to get the units bar in a horizontal position.

This game will give a good sense for the relationship between commonly used fractions and their decimal equivalents.

These fraction to decimal equivalents will be used in this program:

rabbit 1/2 = 0.50

Blinker 1/4 = 0.25

bird 1/5 = 0.20

beetle 1/8 = 0.125

bee 1/10 = 0.10

butterfly 1/20 = 0.05

You will be timed. The game will stop after you weigh 10 characters. Try to achieve a score of 3 or better. A score of 5 or more in one minute is excellent.


  1. The relative distances of units, tenths, hundredths, thousandths, and ten yhousandths along a decimal number lines.
  2. Sections along the hundredths number line are 1/10 the size of sections along the tenths number line and sections along the tenths number line are 1/10 the size of sections along the units number line.
  3. The fraction 1/2 is equal to 0.50, the fraction 1/4 is equal to 0.25, the fraction 1/5 is equal to 0.20, the fraction 1/8 is equal to 0.125, and the fraction 1/20 is equal to 0.05.
  4. The decimal number line is dense.Each section along the decimal number line can be divided into ten smaller sections.