Question

Ada is showing her work in simplifying (5.9 − 1.8) − 6.2 + 4.1. In which step did Ada make an error?

Step 1: (5.9 − 1.8) − 6.2 + 4.1

Step 2: 5.9 + (−1.8 − 6.2) + 4.1 (associative property)

Step 3: 5.9 − 8 + 4.1

Step 4: 5.9 + 4.1 − 8 (associative property)

Step 5: 10 − 8 = 2

Answer 1

step 4:.... should be : 5.9 + 4.1 - 8 (commutative property)