46
A student incorrectly simplifies an expression. The expression and the student's work are
shown below.
40
5-(4/12)
(
Step B: 5 + 8
Step C: 13
Step A: 5 +
-40
In which step did the student first make an error? Be sure to include the correct value of
the expression in simplest form in your answer.
Explain your answer.