ROUNDING OFF
Nov 11, 2014
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ROUNDING OFF. the process of deleting nonsignificant digits from a calculated number. Rules for Rounding Off Numbers If the first digit to Then the last significant Examples be dropped is: digit should: (Rounded off to 3 sig. figs.)
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ROUNDING OFF • the process of deleting nonsignificant digits from a calculated number. Rules for Rounding Off Numbers If the first digit to Then the last significant Examples be dropped is: digit should: (Rounded off to 3 sig. figs.) _________________________________________________ Greater than 5 Be increased by 1 42.68 5.3999 _________________________________________________ Less than 5 Stay the same 17.326 0.9994 _________________________________________________ 5, followed by Be increased by 1 2.7852 nonzero digit(s) 15.555 42.7 5.40 17.3 0.999 2.79 15.6
ROUNDING OFF Rules for Rounding Off Numbers For numbers ending in the digit 5 or 0 andthe first digit to be dropped is 5, alwaysround up to the nearest even number. This strategy prevents compounding round off errors in the final answer. Examples (Rounded off to 3 sig. figs.) 4.635 0.2775 78.65 100.50 4.64 0.278 78.6 100.
ROUNDING OFF • Rounding off must be carried out in a single step example: 14.348 (to 3 SF) should not be first rounded to 14.35 and then to 14.4. • Round off only at the final stage of the calculation and to carry all digits in the memory of the calculator until the final stage, or • Add an extra SF for each intermediate stage until the final stage of the calculation.
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Rounding off numbers
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Rounding off numbers - PowerPoint PPT Presentation
Rounding off numbers
Rounding off numbers. to the tens, hundreds and thousands. round off the nearest tens or hundreds ... round off to the hundreds or thousdands. 120 = 145 ... – powerpoint ppt presentation.
- To the tens, hundreds and thousands
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