Order of operations

48d4t12
It is generally accepted by mathematics educators and by scientific calculator companies that in the “correct” order of arithmetic operations, multiplication and division are done from left to right. Thus, 48÷4×12 is evaluated as 144. The Casio fx-82MS and the Casio fx-350ES shown above give this answer. There is, however, some disagreement whenever parentheses are used to indicate multiplication.

My daughter’s high school teacher asked her to evaluate 48÷4(12). My daughter’s answer was 144; her teacher’s answer was 1. What answer is given by the calculators?

48d4p12
The fx-82MS gives an answer of 1; the fx-350ES gives an answer of 144.

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