I need someone to check and go over my answers to make sure they are correct and if not could you go over them with my on why and how to solve correctly??

Question

Thank you much appreciated..

Add.

-4/5 + (9/20) = 5/25

1 + (-2) + 3 + (-4) = 10

5/3 + (-4/3) + 5/3 = 6/3

Answer 1

No, No, and the last, yes.

on the first, change all terms to have 20 in the denominator.
On the second, see my other post.

Answer 2

-4/5 + (9/20) =
Note that the common denominator is 20, not 25.

-(16/20) + (9/20) = -(7/20)
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1 + (-2) + 3 + (-4) =
I don't see how you can get 10 from this problem.

4 + (-6) = ?
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Your last problem is right -- but can be reduced to 2.

Answer 3

I did not read or do it carefully

so I reworked these problems and my answers are:

1. -7/20

2. -2

and the third one is 6/3 = 2