- Since 4 is in the tenths place, 311.48 is between 311.4 and 311.5
- 311.45 is the midpoint between 311.4 (311.40) and 311.5 (311.50)
- As illustrated on the number line, 311.48 is greater than the midpoint (311.45)
- Therefore, 311.48 rounded to the nearest tenth (one decimal place) = 311.5
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