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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

Step 2; she wrote commutative instead of distributive
Step 4; she wrote commutative instead of distributive
Step 4; she wrote commutative instead of associative
Step 2; she wrote commutative instead of associative

Respuesta :

Step two because she need to do left to right

Answer: Mistake made by Eva is: Step 2; she wrote commutative instead of associative Step-by-step explanation: Associative property states that if a,b and c are three elements then, a+(b+c)=(a+b)+c and Commutative property states that a+b=b+a Step 1: (7.3 – 7.2) – 3.8 + 3.7 Step 2: 7.3 + (–7.2 – 3.8) + 3.7 (associative property) Step 3: 7.3 – 11 + 3.7 Step 4: 7.3 + 3.7 – 11 (commutative property) Step 5: 11 – 11 = 0 Hence, Mistake made by Eva is: Step 2; she wrote commutative instead of associative

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