Answer:
For the first one (which seems like question 4).
31/8, 3.7, 3 3/4, 3.89 From least to greatest. First you need to change 31/8 by dividing it. You get 3.875. Now you need to do 3 3/4, but for this you can just take 3/4 and make it into a decimal, which is .75. Now you have 3.75
The numbers are now 3.875, 3.7, 3.75, and 3.89. From least to greatest, they are 3.7, 3 3/4, 31/8, and 3.89 (Answer A).
Question 5.
27/5, 5.36, 5 3/5, and 33/6.
27/5 = 5.4
5 3/5 = 5.6
33/6 = 5.5
5.4, 5.36, 5.6, and 5.5
From least to greatest, it would be 5.36, 27/5, 33/6, 5 3/4 (Answer D)
Question 6
8 3/4 + n + 2 3/8 + 4 1/2 = 23 1/8
4 1/2= 4 4/8
8 3/4 = 8 6/8
8 6/8 + n + 2 3/8 + 4 4/8 = 23 1/8
8 6/8 + 2 3/8 = 10 9/8 = 11 1/8
11 1/8 + 4 4/8 = 15 5/8
23 1/8 - 15 5/8 = 23.125 - 15.625
23.125 - 15.625 = 7.5 = 7 1/2
n = 7 1/2 (Answer C)
Question 7
z/12 = 6 3/4
6 3/4 = 6 9/12
z/12 = 6 9/12
Guess and Check
81/12 = 6 9/12?
81/12 = 6 9/12
z = 81 (Answer A)