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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