Abott simplified an expression. His work is shown below.
9.5 divided by 0.25 + 4 (0.25 + 0.5) + 6
Step 1 9.5 divided by 0.25 + 4 (0.75) + 6
Step 2 38 + 10 (0.75)
Step 3 38 + 7.5
Step 4 45.5
In which step did Abott make his first mistake?
step 1
step 2
step 3
step 4
