Exponential notations are ways of writing very large or very small numbers using exponents. The first step is to add or move the decimal point. For a number like 0.00435 you move the decimal to make it 4.35, or for 345,000 the decimal would be 3.45. After moving the decimal you count how many spaces. If the decimal moved to the right then it looks like 4.35*10^-3 and when moving left it would read 3.45*10^5.
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Scientific notation (also called standard form or exponential notation) is a way of writing numbers that accommodates values too large or small to be conveniently written in standard decimal notation.
The exponential notation of 128 is 1.28 × 102
270.0 = 2.7 x 102 in exponential notation.
1,296 can be written as 1.296 × 103 in exponential notation.
3x3x3x5x5 expressed in exponential notation is: 33 x 52