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Today in MPS
1 . TURN IN HW ASSIGNMENT
(SCIENTIFIC NOTATION)
2 . SIGNIFICANT FIGURES NOTES
3 . “SIGGY FIGGY” PRACTICE
Significant Figures
 a.k.a – “siggy figgies”
 Rules:
 All non-zero digits are significant.
 Trailing zeros after the decimal are significant.
 Zeros between two other significant digits are significant.
 Leading zeros are never significant
“siggy figgies”
How many significant digits are contained in each of the
following numbers? Copy this assignment on a separate
sheet of paper. Circle your answers.
1.
519
2.
0.19
3.
659.42
4.
2.0050
5.
0.04
6.
0.0498
7.
63500
8.
0.10082
9.
5000
10.
0.0000027
“siggy figgies”
ADDITION AND SUBTRACTION
 The answer should be rounded off so as to contain the same
number of decimal places as the least accurate value.
 Examples:
17.15
2 digits after the decimal
-4.170
3 digits after the decimal
12.98
2 digits after the decimal
12.7
4.716
+13.85
31.3
1 digit after the decimal
3 digits after the decimal
2 digits after the decimal
1 digit after the decimal
“siggy figgies”
MULTIPLICATION AND DIVISION
 The answer should be rounded off so as to contain
the lowest number of significant digits, regardless of
the decimal point.
“siggy figgies”
 Examples:
3.17
x 5.186
16.4
18.35
0.717
= 25.6
3 significant digits
4 significant digits
3 significant digits
4 significant digits
3 significant digits
3 significant digits
“siggy figgies”

Copy this assignment on a separate sheet of paper. Write your answer using the correct
number of significant figures. Circle your answers.
11.
12.
13.
14.
15.
16.
17.
18.
19.
20.
21.
22.
23.
24.
37.76 + 3.907 + 226.4
319.15 – 32.614
104.632 + 27.09452 + 3.6125
3.156 x 4.103
12.16 / 3.12
1.35 x 2.79 x 4.06
(1.75)3
2.176 x 2.74
0.005763 / 0.0251
127.0 x 0.000352
1255 + 429.6 + 37.254
37.0968 + 17.93724
20.6 – 3.71
0.00518 x 3.0