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Rules for rounding off numbers. If the digit to be dropped is greater than 5, the last retained digit is increased by one. For example, 12.6 is rounded to 13. If the digit to be dropped is less than 5, the last remaining digit is left as it is. For example, 12.4 is rounded to 12.
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 and Rounding – Explanations and Examples Read pages 18-22 in your Lab Manual for a more thorough discussion of the meaning of significant figures and how it relates to accuracy, precision, and error.
SIGNIFICANT FIGURES. The amount of approximation required in a number may be described in another way by saying how many significant figures are required. To find how many significant figures a number contains count all figures in the number except zeros at the beginning or end of the number.
Use the order of mathematical operations to determine which order to apply the rules for addition/subtraction (determine the number of sig figs for that step) or the rules for multiplication/division.
7 wrz 2016 · Rules for rounding with sig figs: Free Download of Significant Figures Posters. Significant Figure Posters (PDF) (1208 downloads ) Significant Figure Posters (Editable Publisher File ZIP) (830 downloads ) For the editable file you’ll also need to download these free fonts: Wellfleet and Folks-Light. Want more science posters?
Significant Figure Rules. You can navigate to specific sections of this handout by clicking the links below. Determining Number of Significant Figures (Sig Figs): pg. 1. Addition/Subtraction: pg. 2. Multiplication/Division: pg. 2. Conversions: pg. 3. Sample Problems: pg. 4. Determining Number of Significant Figures (Sig Figs) .
