Catron evaluates the expression (negative 9) (2 and two-fifths) using the steps below.
Step 1: (Negative 9) (2 + two-fifths)
Step 2: (Negative 9) (Negative 2) + (negative 9) (two-fifths)
Step 3: Negative 18 + (negative 9) (two-fifths)
Step 4: (negative 27) (two-fifths)
Solution: Negative StartFraction 54 over 5 EndFraction = Negative 10 and four-fifths
Which describes Catron’s error?
She incorrectly broke up 2 and two-fifths.
She incorrectly distributed the –9; she should have distributed 2.
She did not follow order of operations.
She incorrectly converted from an improper fraction to a mixed number.
