To simplify the expression \( 12 - 23 + 4 \div 2 + 24 \), we follow the order of operations (PEMDAS/BODMAS: Parentheses/Brackets, Exponents/Orders, Multiplication and Division (from left to right), Addition and Subtraction (from left to right)).
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Division:
- \(4 \div 2 = 2\)
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Now our expression looks like this: \[ 12 - 23 + 2 + 24 \]
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Performing from left to right:
- First, do \(12 - 23\): \[ 12 - 23 = -11 \]
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Update the expression: \[ -11 + 2 + 24 \]
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Now continue from left to right:
- Adding \( -11 + 2 \): \[ -11 + 2 = -9 \]
- Next, adding \( -9 + 24 \): \[ -9 + 24 = 15 \]
So, the simplified result of the expression \( 12 - 23 + 4 \div 2 + 24 \) is 15.
Since option 15 isn't provided in your listed responses, please double-check the options for any errors. If there are any discrepancies, kindly provide the correct options or clarify the question.