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Decimal fractions are written in expanded form the same way that whole numbers are written in expanded form. Express the value as the digit times its place value.

__Example__12.34 = 1*10 + 2*1 + 3*.1 + 4*.01 = 1*10^1 + 2*10^0 + 3*10^-1 + 4*10^-2 (exponential form)