It is: 27+89 = 116
The sum of 89 is simply 89 itself, as it is a single number. If you are asking for the sum of multiple instances of 89, you would need to specify how many instances there are. For example, the sum of two instances of 89 would be 178.
70 + 19 = 89 or: the sum of 70 and 19 is 89
67 + 89 = 156
34.6 + 89 = 123.6
100
89 + x = x +89
The sum of 101 and 89 is 190.
316
122
89
The sum of 14.761 and 27 is.... 41.761.
The sum of 15 and 27 is 42.