PDF Worksheet: Significant Digits, Part 2 Name Multiplication and ...

[Pages:1]Worksheet: Significant Digits, Part 2

Name________K_E_Y________

Multiplication and Division-

How many significant digits should the results of these calculations have?

a. (4500)(0.002)(6.9 x 103) ____1____

b. (3.00 x 10-8)(0.003010) ____3____

(9.002 107 )(7200) c. (0.080)(6.1159 102)

____2____

Addition and SubtractionCircle the last column to which these calculated answers will be rounded:

1005.2 26.35

64.800 8940

0.0055 0.01127

0.0028

78.066

0.70

Rounding: Round to three (3) significant digits:

a. 3.14159 ____3_.1_4____ b. 0.002927 ___0._0_0_29_3___ c. 23998 ___2_4_0_0_0___

d. 124,500 __1_2_4_,0_0_0___ e. 12.98 ____1_3_.0____ f. 55.650001 ___5_5_.7____

Calculations and Rounding: Perform these calculations and round to the correct number of significant digits.

a. 791.6 x 52 = ___4_1,_0_00____ b. 98.4 ?0.0075 = _____9_8._4____ c. 852 x 27.0 = ____23_,_00_0_____ d. 7500 +123.4 ?0.06 = ____7_,6_0_0______ e. (1.50)(1700)(2.0 x 10-4)/3.4378 = _____0._1_5_____

Review: When measurements are accurate, they _a_r_e_c_lo_s_e _to_t_h_e_a_cc_e_p_te_d_v_al_u_e_(c_o_rr_e_ct_)_. When measurements are precise, they ________a_re_c_l_os_e_to__ea_c_h_o_th_e_r_______.

Give the number of significant digits in these measurements:

a. 93,000,000 mi ___2___

e. 235,000 m ___5___

b. 404.3 kg ___4___ c. 0.00303 cm ___3___ d. 0.0027 g ___2___

f. 0.7070 s ___4___ g. 4500.0 m3 ___5___ h. 4.00 x 10-2 mm ____3___

PHYSICSFundamentals

? 2004, GPB

1-21a

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