- Since 1 is in the tenths place, 13.188 is between 13.1 and 13.2
- 13.15 is the midpoint between 13.1 (13.10) and 13.2 (13.20)
- As illustrated on the number line, 13.188 is greater than the midpoint (13.15)
- Therefore, 13.188 rounded to the nearest tenth (one decimal place) = 13.2
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