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

How many significant figures are in the number 153.0 L?

Back

4 significant figures.

Front

How many significant figures are in the number 0.010 moles?

Back

2 significant figures.

Front

How many significant figures are in the number 0.012 grams?

Back

2 significant figures.

Front

How many significant figures are in the number 3.0x10^25?

Back

2 significant figures.

Front

What is the rule for rounding numbers to a specific place?

Back

If the digit to the right of the place you are rounding to is 5 or greater, round up. If it is less than 5, round down.

Front

Round 51.996 to the 100th place.

Back

52.00.

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

How many significant figures are in the number 100?

Back

1 significant figure (unless specified otherwise, such as in scientific notation).