106 = 1,000,000 The exponent 6 is a short cut to writing out a million with 6 0s. If that may seem a minor saving, consider a trillion = 1012 or 1 followed by 12 0s. While the second may be easier to understand, it is also more liable to errors - in writing and reading.
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Less digits are needed as for example 4*4*4*4*4 is 45
You add the exponents. Example: 102 x 103 = 105.You add the exponents. Example: 102 x 103 = 105.You add the exponents. Example: 102 x 103 = 105.You add the exponents. Example: 102 x 103 = 105.
This is easiest to explain with an example. One of the laws of exponents says that division of numbers containing exponents makes the exponents subtract from each other. For example, 24/23 = 2(4-3) = 21 = 2. Expanded to use numerical values, 16/8 = 2. Similarly, 23/23 = 2(3-3) = 20 = 1. It therefore follows that anything to the power zero is equal to one.
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They can be written as reciprocals with positive exponents. For example, 5-7 = (1/5)7