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Metric System and Very Large/Small Numbers Metric prefixes you should know: Prefix micro milli centi deci kilo Mega Giga symbol µ m c d k M G Decimal Value 10-6 10-3 10-2 10-1 103 106 109 How many centimeters are in a meter? How many millimeters are in a centimeter? How many meters are in a kilometer? 5.53 m = ________cm 2.7mm = ________m 1583.4cm = ___________m 1583.4 cm = __________mm Scientific Notation To express either very large or small numbers, you write them in scientific notation. The decimal point needs to be moved so it is between the first and second digit. You count the number of places you move the decimal point. If the number is bigger than 1 the exponent is positive. If the number is less than one ,the exponent is negative. Examples: 5346000 = 5.346 X 106 0.000000821 = 8.21 X 10-7 Try these: 12.53 = 0.00326 = 13740000000 = 0.000000000098 = 537 = 0.0000456 = Now try to convert scientific notation to a number. 1.23 X 103 = 5.29 X 10-5 = 3.74 X 106= 1.74 X 10-9 =