Significant figures | Science Toolkit | Khan Academy

Courses on Khan Academy are always 100% free. Start practicing—and saving your progress—now! Significant figures show the precision of a measurement. They apply to measured values, not exact counts. All nonzero digits are significant, as are zeros between nonzero digits. Leading zeros are not significant, and trailing zeros are significant only when a decimal point is present. Scientific notation is a clear way to show the correct number of significant figures. Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today! Donate here: https://www.khanacademy.org/donate?ut... Volunteer here: https://www.khanacademy.org/contribut...