Compare, order, and locate signed integers and rational numbers on a number line.
Place a contextual signed value on a number line
Problem
Represent a submarine \(120~\text{meters}\) below sea level with a signed location.
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What this problem is really about
Use sea level as zero, then separate the location into direction and distance. The word “below” determines the negative side of the scale, while one hundred twenty meters supplies the magnitude. Combining that sign, magnitude, and unit gives the signed location; imagining equal downward moves from zero provides a quick check.
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