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Let's simplify this expression while following the order of operations which states that exponents come before multiplication and division, which come before addition and subtraction, and that parentheses come before all of them,
We will start by simplifying the expression inside the parentheses and calculate the result of the subtraction within them, then - since division comes before subtraction, we will first perform the division operation and then perform the subtraction operation:
Therefore, the correct answer is answer B.
7
Solve the following equation:
\( 30 - (10 + 7) = \)
Order of operations isn't left-to-right! PEMDAS tells us that division comes before subtraction, so even though subtraction appears first, we must do the division 6÷2 = 3 before subtracting.
You probably calculated (10-6)÷2 = 2, but that's not what the expression shows! The parentheses only group (10-4), not (10-6).
Use PEMDAS: Parentheses, Exponents, Multiplication/Division (left to right), Addition/Subtraction (left to right). Division comes before subtraction!
Both symbols mean division! The : symbol is commonly used in some countries instead of ÷. So 6:2 means the same as 6÷2 = 3.
Yes, but be careful! Make sure your calculator follows order of operations correctly. Some basic calculators work left-to-right and might give you the wrong answer of 2 instead of 7.
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