AII-1 APPENDIX II LAWS OF EXPONENTS The International Symbols Committee has adopted prefixes for denoting decimal multiples of units. The National Bureau of Standards has followed the recommendations of this committee, and has adopted the following list of prefixes: Numbers Powers of ten Prefixes Symbols 1,000,000,000,000 1012 tera T 1,000,000,000 109 giga G 1,000,000 106 mega M 1,000 103 kilo k 100 102 hecto h 10 10 deka da .1 10-1 deci d .01 10-2 centi c .001 10-3 milli m .000001 10 -6 micro u .000000001 10-9 nano n .000000000001 10-12 Pico p .000000000000001 10-15 femto f .000000000000000001 10-18 Atto a To multiply like (with same base) exponential quantities, add the exponents. In the language of algebra the rule is a^m a n = a^m+n To divide exponential quantities, subtract the exponents. In the language of algebra the rule is