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what is a sig fig
number of digits that are known plus 1 estimated digit
how many sig figs do exact numbers have
how many sig figs do defined numbers have
they're exact (100 cm=1m).
are all non-zero numbers significant
zeros to the left of nonzero numbers (are/are not) significant before or after a decimal?
0.0032 or 003200
- not significant
- 2 sig figs
zeros between sig digits are/are not significant
- are significant
- 6 sig figs
are zeros at the end of a number and to the right of a decimal significant? 5.00
yes. there are 3 sig figs.
Is a zero significant when it's to the right of a nonzero number and to the left of an implied decimal point
no, there are only 2 sig figs
how many sig figs do exact conversions have
- all numbers in exact conversions are significant
- (except 0's that are place holders).
0's to the right of a nonzero number and left of a decimal point are/are not significant?
are significant. there are 5 sig figs
what's the rule if the digit to be dropped is greater than 5?
if the digit to be dropped is less than 5 round...
if the digit to be dropped is exactly 5 without numbers to the right...
- the number to the left is used for rounding.
- If odd, round up
- if even, it remains 5.
where is the proper place for a decimal in scientific notion
after the first nonzero digit
what's the rule about calculating sig figs
the result of the calculation cannot be more percise than the lease percise measurement in the calculation.
how many sig figs 190.6 X 2.3=438.28
drop the last 3 digits to get 440, because you round up first. Correctly written as 4.4 X10^2
when adding and subtracting it is important that the resulting number be rounded to have the same amount of decimal places as the value with the ____ decimal places.
fewest decimal places. Number rounded down after the decimal=306 or correctly written as 3.06X10^2
0.018 or 1.8X 10^-2
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SI unit of measure of substance
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