Rules for Significant Digits
LMGHS
Regents Chemistry
Worksheet # 0.2
Name: _________________________,____________________ Band: ______ Date: ______
Significant Figures (Digits)
1) The number of significant figures in
a) 4900 is ________________________
b) 1,000 is _______________________
c) 0.0102 is _______________________
d) 540.00610 is _____________________
2) How many significant figures are in each of the following numbers?
1) 5.40 _______ 6) 1.2 x 103 ________
2) 210 _______ 7) 0.00120 _________
3) 801.5 _________ 8) 0.0102 ___________
4) 1,000 _________ 9) 9.010 x 10-6 ________
5) 101.0100 _______ 10) 2,370.0 ____________
3) Add:
a) 16.5 + 8 + 4.37 =
b) 13.25 + 10.00 + 9.6 =
c) 2.36 + 3.3 =
4) Multiply:
a) 2.6 x 3.78 =
b) 3.08 x 5.2 =
c) 6.54 x 0.37 =
d) 0.0036 x 0.02 =
5) Divide:
a) 35 / 0.62 =
b) 0.58 / 2.1 =
c) 3.76 / 1.62 =
6) a. The number of significant figures in 200.000 is ___________
b. The number of significant figures in 0.00230300 is ____________
c. Correctly rounded the quotient of 2.00g/20.0ml is _____________
d. Correctly rounded the sum of 5.40 cm and 801.5 cm is ______________
e. Correctly rounded, the product of 2.000cm x 20.0 cm is ________________
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