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Simplify this expression paying attention to the order of arithmetic operations. Exponentiation precedes multiplication whilst division precedes addition and subtraction. Parentheses precede all of the above.
Therefore, let's first start by simplifying the expressions within the parentheses. Then we can proceed to perform the multiplication between them:
Therefore, the correct answer is option A.
368
\( 140-70= \)
Order of operations matters! PEMDAS tells us parentheses come first. If you multiply 3×12 first, you're breaking the grouping that parentheses create.
These are common wrong answers from incorrect order. 68 comes from adding across: (3×12)+(20×4), while 836 comes from multiplying first: 3×20×12×4. Always do parentheses first!
Yes! After getting 368, divide it by each parentheses result: and . Both should match your parentheses answers.
Without parentheses, would equal 247, not 368! Parentheses change the entire calculation by grouping operations together.
Absolutely! Most calculators follow PEMDAS automatically. Just type (3+20)×(12+4) exactly as written, and you'll get 368. The parentheses tell the calculator what to do first.
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