It is: -5+1+8+5 = 9
-1
12
No, 1 and 1/5 is not equal to 6/5. 1 and 1/5 is equal to 6/5 plus 1/5, which is 7/5.
5
4 (same as 5 - 1)
No, 1 + 2 + 3 + 4 + 5 = 15.
2/5 plus 1/3 plus 5/6 is equal to 1.57 or 1 57/100
1/5 plus 1/7 plus 3/10 is equal to 0.642857
+1.
5/8
10x + 5 which is also equal to 5(2x + 1)