Hannah is showing her work in simplifying (6.1 βˆ’ 4.5) βˆ’ 2.5 + 3.9. Identify any error in her work or reasoning.

Step 1: (6.1 βˆ’ 4.5) βˆ’ 2.5 + 3.9
Step 2: 6.1 + (βˆ’ 4.5 βˆ’ 2.5) + 3.9 (associative property)
Step 3: 6.1 βˆ’ 7 + 3.9
Step 4: 6.1 + 3.9 βˆ’ 7 (distributive property)
Step 5: 10 βˆ’ 7 = 3 (5 points)
please help