121 = 12 = (1 x 10) + (2 x 1)
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10 raised to the power of -1 is 0.1
The expanded notation (form) of 4.012 is: (4 x 1) . (0/10) + (1/100) + (2/1000)
12 thousandths (0.012) = (0 x 1) . (0/10) + (1/100) + (2/1000)
In standard form it is 1*10^-1.In expanded form it is 0.1
12 = (1 x 101) + (2 x 100) OR (1 x 10) + (2 x 1).