3*1/2+2=

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Not really sure how the question is related to this material, but... This appears to be Order of Operations: PEMDAS. When given any expression, you complete the operations in this order: Parentheses, Exponents, Multiplcation & Division (left to right), then Addition & Subtraction (left to right). In this problem, you have Multiplication, Division and Addition, which are done in exactly that order. So to solve, Multiply 3*1, Divide by 2, then add 2.