What are the steps for (4.6 - 9.2) - 0.8 + 5.4

First distribute to get rid of the parentheses.
So step one you get 4.6-9.2-0.8+5.4, then combine like terms. So step two gives you -0.2. And that's the answer

A simple way to remember the steps is to use the phrase...
Please. Parenthesis
Excuse. Exponents
My. Multiplication
Dear. Division
Aunt Addition
Sally Subtraction

(4.6 - 9.2) - 0.8 + 5.4

First do (4.6 - 9.2) because it is inside the parenthesis.

(4.6 - 9.2) - 0.8 + 5.4
-4.6 - 0.8 + 5.4

Second look for exponents which you don't have. Then multiplication which you also don't have. Then look for division which you also don't have.

Next, subtract

(4.6 - 9.2) - 0.8 + 5.4
-4.6 - 0.8 + 5.4
-5.4 + 5.4

Then add

(4.6 - 9.2) - 0.8 + 5.4
-4.6 - 0.8 + 5.4
-5.4 + 5.4
0

*Remember always follow PEMDAS and go left to right.