54 + 5 = 59
8 plus 5 is 13. 8 plus 54 is 62.
1/9 + 5/6 = 6/54 + 45/54 = 51/54 = 17/18 <-------------------------
The product is: 1674
248.23247
54/10 = 27/5
-59
54 4 plus 5 is 9, not 54. All questions like this can be solved by putting 4 stones on one side and 5 stones on the other and adding up the whole lot.
11 + 694 - 54 + 497 + 54 = 1202
It is: 126 plus 54 = 180
208
18 + 18 + 18 = 54