sig figs contents: rules for how many how many examples rules for addition and subtraction...
Post on 29-Dec-2015
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Sig Figs Contents:•Rules for how many•How many examples•Rules for addition and subtraction•Whiteboards for addition and subtraction•Rule for multiplication and division•Examples of multiplication and division
How many sig figs are there?
TOC
1. The leftmost nonzero digit is the most significant digit2. If there is no decimal point, the rightmost nonzero digit is the least significant digit3. If there is a decimal point, the rightmost digit is the least significant digit even if it is a zero.4. All digits between the least and most are also significant.
Rule for multiplication and division
TOC
Round final answer to least number of sig figs of the operands:
123.50 x 21 2593.5 round to 2 places: 2600
Never round until totally done.
Express the answer with the correct number of sig figs:
1329.0 x 25 = ?
W
= 33,225 -> 33,000
33,225 > 33,000
Express the answer with the correct number of sig figs:
102.085 / 323 = ?
W
= 0.316052632 -> .316
0.316052632 >.316
Express the answer with the correct number of sig figs:
8.015 / 570 = ?
W
= 0.014061404 -> .014
0.014061404 > .014
Rule for addition and subtraction
TOC
Round final answer to least common place:
123.5497+21.1 144.6497 -> 144.6 as an expressed answer
Again, never round until totally done.<IB apparently does not require this rule>
Express the answer with the correct number of sig figs:
1.058 + 15.1 = ?
W
= 16.158 -> 16.2
16.158 = 16.2
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