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Unit Conversion
Number Decimal 1 00 0
T G M K m μ n P … …
2
9
106 103 10 -3^10 -6^10 -9^10 -
Note 1: 1X1000=1000 (4 places, 3 zero) but 1/1000=0.001 (3 places, 2 zero) Note 2: math
X
a
=X·X·X·X·X·X·X·X· · · multiply by a times
103 =10 x 10 x 10=
106 =10 x 10 x 10 x 10 x 10 x 10 = 1000000
10 -3=1/10 x 10 x 10 = 1/
10 -6=1/10 x 10 x 10 x 10 x 10 x 10 = 1/
tera giga mega kilo Base Unit: Gram Meter Liter^ deci^ centi^ mili^ micro^ nano^ pico
T G M K d c m μ n P
1 2
9
6
3
2
1
0
1
2
3
6
9
12 Two rules
1 subtract exponents 2 move decimal point to the direction we work out from rule 1 Positive : moving right -> number is getting bigger Negative: moving left -> number is getting smaller tera giga mega kilo Base Unit: Gram Meter Liter^ deci^ centi^ mili^ micro^ nano^ pico
T G M K d c m μ n P
2
1
2
3
6
9
12 Moving right the resultant number should become bigger Moving left the resultant number should become smaller Case 1 450Mm = cm? Step1 : Check: moving right, Step2 : (M=6, c=-2, subtraction = 6-(-
- = 8 Moving 8 places to the right 450 00000000 cm Case 1 124 μm = cm? Step1 : Check: moving left Step2 : (μ=-6, c=-2, subtraction = -6- (-2) = - Moving 4 places to the left 0.0124 cm Case 2 12Gm = Km? Step1 : Check: moving right Step2: 9-3= 12000000Km Case 2 20pg = Kg? Step1 : Check: moving left -12-3=- 0.000000000000002Kg Case 3 290mg = pg? Step1 : Check: moving right Step2: -3 - (-12) = 9 290 000000000 pg Case 3 290Mbite = Tbite? 6- (12) = - 0.000290 Tbite
