These four basic rules will help determine the number of significant figures in any number. However if you wish to do mathematical calculations and still work out the number of …

Significant figures (or significant digits) are the number of digits important to determine the accuracy and precision of measurement, such as length, mass, or volume.

The number of significant figures in a result is simply the number of figures that are known with some degree of reliability. The number 13.2 is said to have 3 significant figures.

Oct 21, 2025 · Significant figures are used to report a value, measured or calculated, to the correct number of decimal places or digits that will reflect the precision of the value. The …

When performing mathematical operations, there are two rules for limiting the number of significant figures in an answer—one rule is for addition and subtraction, and one rule is for …

In the BBC Bitesize KS23 maths guide, you can learn how to round numbers to three significant figures. You'll also learn what a significant number is!

May 8, 2014 · Learn the rules for significant figures. Get examples in addition, subtraction, multiplication, and division and print worksheets.

Significant figures are the number of digits in a value, often a measurement, that contribute to the degree of accuracy of the value. We start counting significant figures at the first non-zero digit.

In this guide, you’ll learn what significant figures are, why they matter, how to count them, and the rules for significant figures with clear examples. We'll also answer some common questions …

Rule 8 provides the opportunity to change the number of significant figures in a value by manipulating its form. For example, let's try writing 1100 with THREE significant figures.