Question

Ada is showing her work in simplifying (5.9 - 1.8) - 6.2 + 4.1. In which step did Ada make an error? (5 points)

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

Answer: step 4

Explanation:

Answer 2

Step 4 is where she made the error.

Explanation:

This step is actually known as the commutative property. That property states that we can change the order of numbers as long as we keep the signs and it maintains it's validity.