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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
infinite

how many sig figs do defined numbers have
they're exact (100 cm=1m).

are all nonzero numbers significant
yes

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
502.001
 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
6200
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?
55300.0
are significant. there are 5 sig figs

what's the rule if the digit to be dropped is greater than 5?
round up

if the digit to be dropped is less than 5 round...
round down

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.
125.17
129.
52.2
+

306.
fewest decimal places. Number rounded down after the decimal=306 or correctly written as 3.06X10^2

calculate (1.0391.020)/1.039=
0.018 or 1.8X 10^2

SI system basic measure of length
meters

SI measure of mass
kilogram

Si unit of measure of temp
kalvin K

SI unit of measure tim
second s

SI unit of measure of substance
mole m

SI unit measure of electric current
ampere A

SI unit measure of luminous intensity
candela cd

exe E is the numerical value for SI
10^18

Penta P is SI value for
10^15

tetra T is the SI value for
10^12

giga is the SI value for
10^9

mega is the SI value for
10^6

kilo is the SI value for
10^3

hecto h is the SI value for
10^2

da is the SI value for
10^1

deci d is the SI value for
10^1

centi c is the SI value for
10^2

milli m is the SI value for
10^3

micro is the SI value for
10^6

nano n is the SI value for
10^9

pico p is the SI value for
10^12

femto f is the SI value for
10^15

atto a is the SI value for
10^18

