Question

Eva is showing her work in simplifying (7. 3 – 7. 2) – 3. 8 + 3. 7. In which step did Eva make an error?

Step 1: (7. 3 – 7. 2) – 3. 8 + 3. 7
Step 2: 7. 3 + (–7. 2 – 3. 8) + 3. 7 (commutative property)
Step 3: 7. 3 – 11 + 3. 7
Step 4: 7. 3 + 3. 7 – 11 (commutative property)
Step 5: 11 – 11 = 0

Answer 1

Eva didn’t calculate (-7.2 - 3.8) correctly. The correct answer is -3.4 instead of -11.