Significant Figures- ID, Rounding, Calculations

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 does the number 0.002040 have?

Back

4 significant figures.

Front

What is the rule for counting significant figures in a number?

Back

1. All non-zero digits are significant. 2. Any zeros between significant digits are significant. 3. Leading zeros are not significant. 4. Trailing zeros in a decimal number are significant.

Front

Round the number 1009 to three significant figures.

Back

1010.

Front

How many significant figures does the number 0.998005 have?

Back

6 significant figures.

Front

What is the result of (0.0040 cm x 80 cm) + 0.10 cm² with the correct significant figures?

Back

0.4 cm².

Front

Round the number 1047.78 to three significant figures.

Back

1050.

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 do you determine the number of significant figures in a measurement?

Back

Count all non-zero digits, any zeros between them, and trailing zeros in the decimal portion.

Front

What is the difference between exact numbers and measured numbers in terms of significant figures?

Back

Exact numbers have an infinite number of significant figures (e.g., 100 apples), while measured numbers have a limited number of significant figures based on the precision of the measurement tool.