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Math
Percent Video
Math
Subtraction Video
Math
Functions Video
Math
Long Division Video
Math
Multiple Video
Math
Angle Video
Math
Place Value Video
Math
Expanded Form Video
Math
Telling Time Video
Math
Multiplication Table Video
Math
Rounding Decimal Video
Math
Simplifying Fraction Video
Math
Number Line Video
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Mean/Median Mode Video
2:41
Khan Academy
Sal Khan,Monterey Institute for Technology and Education
Evaluating expressions with variables: exponents
In this math lesson, we learn to evaluate an algebraic expression with exponents by following the order of operations (PEMDAS). We substitute a given value for the variable, calculate exponents, perform multiplication, and finally, subtraction. By applying these steps, we successfully find the value of the expression.
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