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test1packet-3302

# test1packet-3302 - Discovery Activity Significant Figures...

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Discovery Activity Significant Figures Chapter 2 The following is a list of numbers. The number of significant figures in each number is written in the parenthesis after the number. Find the pattern, and write a rule telling what digits are not significant. 125(3) 0.0122 (3) 133.8(4) 0.00120 (3) 1002 (4) 0.0001225 (4) 1.9 X 10 2 (2) 10000 (1) 3.20 X 10 -4 (3) 1000. (4) 0.025200 (5) 5.888 X 10 -3 (4) 100.0 (4) 3.002 X 10 3 (4) 100 (1) 1230 (3) 1230. (4) 120.0 (4) 5230.00 (6) 523000 (3) 850 (2) What digits are not significant?_______________________________________ _______________________________________________________________ All other numbers are significant. Multiplying and Dividing Using Significant Figures Observe the following problems and answers. Write a rule explaining how many significant figures to put in the answer of a multiplication or division problem. 3.21 X 21 = 67.41 correct answer 67 7.86 X 2.333 = 18.33738 correct answer 18.3 3.1122 X 4.531 = 14.101378 correct answer 14.10 400 X 3.44 = 1376 correct answer 1000 145.6/25 = 5.824 correct answer 5.8 9.85 / 4.152 = 2.37235 correct answer 2.37 145.3/2.88 = 50.451389 correct answer 50.5 Rule: ___________________________________________________________________ 1

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