Question

Help

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
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A.Step 2; she wrote commutative instead of distributive
B. Step 4; she wrote commutative instead of distributive
C.Step 4; she wrote commutative instead of associative
D. Step 2; she wrote commutative instead of associative

@Daniellelovee

Answer 1

Which is your guess?

Answer 2

ummmm A?

@Daniellelovee

Answer 3

no I'm honestly not 100% sure about this one is not distributive property since it works from the outside to the inside of the parenthesis si it is between C and D and I think C sounds more logical but is definitely between C or D

Answer 4

I think it would be better if you asked for a second opinion on this though I don't want you to get it wrong :)

Answer 5

I am going with D

Answer 6

ok so D?

@texaschic101

Answer 7

thats what I would say if I had to answer it

Answer 8

ok thanks @texaschic101

Answer 9

sure thing :)