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When you round off, you change the value of the number, except if you round off a zero. Following the old rules, you can round a number down in value four times (rounding with one, two, three, four) compared to rounding it upwards five times (five, six, seven, eight, nine).
- Significant Figures
Significant Figure Fable. Measuring Underlies Significant...
- Significant Figures
This online quiz is intended to give you extra practice in counting significant figures ("sig figs") in decimal and scientific notation as well as simple arithmetic problems. Select your preferences below and click 'Start' to give it a try!
Before dealing with the specifics of the rules for determining the significant figures in a calculated result, we need to be able to round numbers correctly. To round a number, first decide how many significant figures the number should have.
Learning Objectives. Give an example of a measurement whose number of significant digits is clearly too great, and explain why. State the purpose of rounding off, and describe the information that must be known to do it properly. Round off a number to a specified number of significant digits.
The following are the significant figures rules governing significant figure determination: The non-zero digits are the ones that count. For example, there are four significant digits in 6575 cm and three significant figures in 0.543.
Significant Figures Practice quiz for 9th grade students. Find other quizzes for Chemistry and more on Quizizz for free!
Significant Figure Fable. Measuring Underlies Significant Figures. A Short Guide to Significant Figures [two-page PDF]
