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Waugh Sheet #3

Multiplication, Division, Addition and Subtraction with Significant Figures

Rule:

1.      Remember the order of operation!!

 Example #1:  (6.198 x 10-15  cm2  +  7.11 x 10-13 cm2) / 600 cm = ___?___     1st perform the operation in parenthesis:  6.198 x 10-15 cm2  +  7.11 x 10-13 cm2 = 6.198 x 10-15 cm2  +  711 x 10-15 cm2 = 717.198 x 10-15 cm2 (keep at least 1 more digit than needed for precision) (underline the significant digits)   2nd perform the division: 717.198  x 10-15 cm2 / 600 cm =  1.19533x 10-15 cm  =  1 x 10-15 cm                                                     (Report only 1 significant digits)                                                          Reported Answer = 1 x 10-15 cm

Directions:  Perform the following operations and report your answers in SCIENTIFIC NOTATION.  Show all work NEATLY ON A SEPARATE SHEET OF PAPER that is attached with a staple or your answer is VOID.  Place your answer in the space provided below.

1.       (12.71 - 2.0)  / 34    =   ___________________

2.      1.64 x 10-4 x (1.2 x 102  + 2.11 x 103)   =   ___________________

3.     (7.07 x 10-4 + 6.51 x 10-2 )   =  ___________________

2.02 x 104

4.      16.4 x 3.1416   = ___________________

5.      6.92 + 7.60 + 400) / 825 = ___________________

6.      (280 x 1023 pm3  +  9.8 x 1022 pm3) / (800 + 20)= ___________________

7.      (8. 220 x 103 dm x 6.00 x 105 dm) / 1200 = ___________________

8.      (7.893 x 105 Mm3 / 8900 Mm) – 27.3   = ___________________

9.      12.387 x 103 fm / (1600 + 860)  = ___________________

10.  9.9987 x 102 dg  ÷  (200 +  270)  = ___________________