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 part.

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 52689 to 3 significant figures.

Back

52700

Front

What is 78.5 rounded to one significant figure?

Back

80

Front

Round 1047.78 to three significant figures.

Back

1050

Front

What is 7.555 rounded to two significant figures?

Back

7.6

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

Round 0.00456 to two significant figures.

Back

0.0046

Front

Round 12345 to four significant figures.

Back

1235

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.