It depends on whether you are working with variables. You cannot add terms with variables that have unlike exponents.
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You do not. The exponent is only subtracted in division.
Same.
By subtracting the two exponents from each other.NOTE: can only be done if the base is the same, like 23/21=22Also, make sure to subtract in the correct order, taking the top exponent and subtracting the one beneath it.
This is effectively the same as lining up the decimal points when adding or subtracting ordinary decimal fractions.
Parentheses, exponents, multiplication and division, addition and subtraction.