Question

5 1/3+ (-3 9/18)

Answer 1

1.8

Answer 2

89/6

Answer 3

-3 and 9/18 becomes -3 and 1/2
Next find the common denominator for both fractions which is 6.
Whatever you do to the denominator, do to the numerator.
Your new fractions will look like this:
5 and 2/6 + (-3 and 3/6)
Add them:
2 and 5/6 is your answer

Answer 4

You also don't have to to reduce the -3 and 9/18 but I find that's easier to do.