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According to the rules of the order of operations, given that the exercise only involves subtraction and addition operations, we solve the exercise from left to right:
Solve the following equation:
\( 12+7-5\text{ }= \)
Addition and subtraction have equal priority in the order of operations! When operations have the same level of importance, we always work from left to right to get the correct answer.
You got lucky this time! In this simple problem, both methods give 4. But in more complex expressions like , the wrong order gives 5 instead of the correct answer 9.
Think of it like reading a sentence - you read from left to right! When addition and subtraction appear together, treat them like words in a sentence and solve them in order.
It applies when operations have equal priority. Addition and subtraction are equal, multiplication and division are equal. But remember: PEMDAS still rules - do parentheses and exponents first!
Simply redo the calculation step by step! Write out each step: becomes becomes .
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