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السؤال 9

The integers -9 and 9 are both marked on a number line. How far from 0 does each of them lie?

  1. Each lies 18 units from 0, the whole span between them.
  2. 9 lies 9 units from 0, and -9 lies further away because it is lower.
  3. -9 lies -9 units from 0.
  4. Each lies 9 units from 0, on opposite sides of it.الإجابة الصحيحة

الشرح

Opposites stand on either side of zero at matching counts of steps, so a walk from zero reaches either mark in nine steps. The figure 18 measures the gap from one mark across to the other, which joins two such walks end to end instead of taking one of them.

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السؤال 9: The integers -9 and 9 are both marked on a number line. How… · Integers and Negative Numbers · Questena