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 1047.78 to three significant figures.

Back

1050

Front

What is 0.658 rounded to 1 significant figure?

Back

0.7

Front

Round 375.6523 to four significant figures.

Back

375.7

Front

Round 52689 to 3 significant figures.

Back

52700

Front

Round 509.96 to 4 significant figures.

Back

510.0

Front

What is the rule for rounding numbers?

Back

If the digit to the right of the last significant figure is 5 or greater, round up. If it is less than 5, round down.

Front

How do you round a number with trailing zeros?

Back

Trailing zeros in a decimal number are significant. For example, 1500.0 has five significant figures.

Front

What is the significance of leading zeros in a number?

Back

Leading zeros are not significant. For example, in 0.0045, there are only two significant figures: 4 and 5.