Significant Figures

Front

What are significant figures?

Back

Significant figures are the digits in a number that contribute to its precision, including 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 significant digits, and trailing zeros in a decimal number. Leading zeros are not counted.

Front

Which digits are significant in the number 0.00456?

Back

The significant figures are 4, 5, and 6 (3 significant figures). Leading zeros are not counted.

Front

What is the rule for addition and subtraction regarding significant figures?

Back

The result should be rounded to the least number of decimal places of any number in the operation.

Front

What is the rule for multiplication and division regarding significant figures?

Back

The result should be rounded to the least number of significant figures of any number in the operation.

Front

How many significant figures are in the number 100.0?

Back

There are 4 significant figures.

Front

How many significant figures are in the number 0.00789?

Back

There are 3 significant figures.

Front

Round the number 0.004567 to two significant figures.

Back

0.0046

Front

Round the number 123.456 to three significant figures.

Back

123.

Front

What is 5.67 + 2.1 rounded to the correct number of significant figures?

Back

7.8