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According to the order of operations, we first solve the exercise within parentheses:
Now we divide:
\( 100-(5+55)= \)
The parentheses tell you to multiply 4×2 first! If you divide first, you're changing the order and will get the wrong answer. Think of parentheses as a protective bubble that must be solved first.
The colon (:) is another way to write division, just like ÷. So means the same as .
Without parentheses, you'd solve left to right: . The parentheses change everything by forcing you to multiply first!
Use PEMDAS: Parentheses, Exponents, Multiplication/Division (left to right), Addition/Subtraction (left to right). Parentheses always come first!
Yes! You can think of it as: What number times 8 equals 80? Since , the answer 10 is correct.
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