Opposite of a Number

Work With the Number Line Contraption

Work Time

Work With the Number Line Contraption

Suppose you put the dot on a number and tossed it over the center; then, you put the dot at the place where it just landed, and tossed it over the center again.

  • Where would the dot land?
  • Write an expression for this action.

INTERACTIVE: Number Line Contraption

  • Use the Number Line Contraption interactive to test what happens if you swing the lever twice.
  • Use a negative sign to represent each swing of the lever.
  • Use a to represent any number.
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