Rounding Significant Figures

Front

What are significant figures?

Back

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.

Front

How do you determine the number of significant figures in a number?

Back

Count all non-zero digits, any zeros between them, and trailing zeros in a decimal number. Leading zeros are not counted.

Front

Round 7256.320004 to 8 significant figures.

Back

7256.3200

Front

Round 0.010229 to four significant figures.

Back

0.01023

Front

Round 1235 to 2 significant figures.

Back

1200

Front

What is 78.5 rounded to one significant figure?

Back

80

Front

What is the rule for rounding when the digit after the last significant figure is 5?

Back

If the digit is 5 followed by non-zero digits, round up. If it is followed by zeros or is the last digit, round to the nearest even number.

Front

What is the significance of trailing zeros in a decimal number?

Back

Trailing zeros in a decimal number are significant because they indicate precision.

Front

Round 0.005678 to three significant figures.

Back

0.00568

Front

Round 1500 to two significant figures.

Back

1500 (or 1.5 x 10^3 to indicate significant figures clearly).