CH.1-Sig figs Flashcards
Do nonzero integers count as s.f.?
Yes
How many s.f. in 3634?
4
Do leading zeros that precede all nonzero integers count as s.f.?
No
0.078 has how many s.f.?
2
0.099 has how many s.f.?
2
Do captive zeros count as s.f.?
Yes
How many s.f. in 19.09?
4
How many s.f. in 16.07?
4
Do trailing zeros count as s.f. if there’s no decimal point?
No
Do trailing zeros count as s.f. if there’s a decimal point?
Yes
How many s.f. in 9.300?
4
How many s.f. in 150?
2
How many s.f. in 180. ?
3
Exact numbers have an —- number of s.f.
infinite
TRUE OR FALSE: The numbers of students in class are an exact number and have infinite s.f.
TRUE
0.00068 has how many s.f.?
2
0.000654 has how many s.f.?
3
879 000 rounded to 1 s.f.?
900 000
88 800 000 rounded to 2 s.f.?
89 000 000
0.089 rounded to 1 s.f.?
0.09
3.00 x 10^2 has how many s.f.?
3 (300.)
TRUE OR FALSE: 00067000.0 has 5 significant figures
False. 6 s.f. (don’t count the first three 0s)
In multiplication/division, we keep the number of s.f. as the numbers with the highest or lowest s.f.?
Lowest
38.65 x 105.93 how many s.f.?
4
In addition/subtraction, we keep the same amount of s.f. as the number with —-
The least amount of decimal places
1.2 + 4.41 how many s.f.?
2
What is the answer to 77.2 + 10.46? How many s.f.?
87.7 it has 3 s.f.
What is the answer to 13.77+ 908.226
922.00
2(1.008 g) + 15.99 g =
18.01 (Multiplication first: 4 s.f. then addition 15.99 is least precise so 18.006 becomes 18.01)
118.7/2−35.5 =
23.9 (First division: 4 s.f. then subtraction: 35.5 has least decimal places s0 23.85 becomes 23.9)
