900 = 9 x 100
9 can be written as 3 to the power of 2
100 can be written as 10 to the power of 2
It is then written as (3 squared) x (10 squared)
I cannot with the editor we use show how to write 3 squared or 10 squared but I hope you know ( 3 superscript 2) x (10 superscript 2).
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289 = (2 x 102) + (8 x 101) + (9 x 100)
Expanded Notation of 25 = (2 x 101) + (5 x 100).
Rewriting a number in its expanded form with exponents helps you to better understand scientific notation. When determining what exponent to use for a power of ten, look at how many zeroes you have. For example, if the number is 1,000, which has three zeroes, it is 10 to the third power.
The expanded notation of 8,394 is (8 x 103) + (3 x 102) + (9 x 101) + (4 x 100)
In scientific notation 2,000,000 is 2.0*10^6