Rounding Sig Figs

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 34.645 to 4 significant figures.

Back

34.65

Front

Round 373,403 to 2 significant figures.

Back

370,000

Front

Round 0.04624 to 1 significant figure.

Back

0.05

Front

Write 0.04967 to 2 significant figures.

Back

0.050

Front

Round 0.30473 to 1 significant figure.

Back

0.3

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, 0.0500 has four significant figures.

Front

What is the significance of leading zeros in a number?

Back

Leading zeros are not significant. For example, in 0.0045, only the digits 4 and 5 are significant.