Counting 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 many significant figures are in the number 0.00076?

Back

2 significant figures.

Front

How many significant figures are in the number 0.94?

Back

2 significant figures.

Front

How many significant figures are in the number 2,000,000?

Back

1 significant figure.

Front

Why are the two zeros in 207.00 significant?

Back

They are significant because they are trailing zeros after a decimal point.

Front

Why is the zero in 15.92340 significant?

Back

It is significant because it is a trailing zero after the decimal point.

Front

What is the rule for counting significant figures in whole numbers without a decimal?

Back

Leading zeros are not significant; only non-zero digits and any zeros between them count.

Front

What is the rule for counting significant figures in decimal numbers?

Back

All non-zero digits are significant, as well as any zeros between them and trailing zeros after the decimal point.

Front

How many significant figures are in the number 100.0?

Back

4 significant figures.

Front

How many significant figures are in the number 0.00450?

Back

3 significant figures.