Significant Figures

When doing mathematical calculations, it is important to employ the correct number of digits in the calculation, and finally, to express the correct number of significant figures in the result. Generally, the number of significant figures in the answer is no more than the number of significant figures in any of the values you used in the calculation.

Convert one million kilometers into miles:

1,000,000 km / 1.609344 km/mile = 621,371.192237 miles = 600,000 miles Convert 238,000 miles into kilometers:

238,000 miles x 1.609344 km/mile = 383,023.872 km = 383,000 km

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