Perform the following calculations with the correct number of significant figures.
159.31 x 204.6

검증된 단계별 안내

Identify the number of significant figures in each number. For 159.31, there are 5 significant figures, and for 204.6, there are 4 significant figures.

When multiplying or dividing numbers, the result should have the same number of significant figures as the number with the fewest significant figures. In this case, the result should have 4 significant figures because 204.6 has 4 significant figures.

Perform the multiplication: \( 159.31 \times 204.6 \). Do not round the result yet; keep all digits for now to avoid rounding errors.

Round the result to 4 significant figures, as determined in step 2. To do this, look at the fifth digit to decide whether to round up or down.

Express the final answer in proper scientific notation or standard form, ensuring it has exactly 4 significant figures.

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주요 개념

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Significant Figures

Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion. Understanding significant figures is crucial for ensuring that calculations reflect the precision of the measured values.

Multiplication of Measured Values

When multiplying measured values, the result should be reported with the same number of significant figures as the measurement with the least number of significant figures. This rule ensures that the precision of the result is not overstated, reflecting the uncertainty inherent in the least precise measurement.

Rounding Rules

Rounding rules dictate how to adjust numbers to maintain the correct number of significant figures. When the digit to be dropped is less than five, the last retained digit remains unchanged; if it is five or greater, the last retained digit is increased by one. Proper rounding is essential for maintaining the integrity of significant figures in calculations.