137 minus 104 is 33.
104 minus 13 is 91.
137 - 35 = 102
240 - 137 = 103
104 - 26 _____ 078
160 - 104 = 56
It is: 275-104 = 171
600 - 104 = 496
Whenever you minus a negative (number), you add. So it would be 104 - (-13), or 104 + 13, which is 117
The differencs is 240 minus 137 equals 103
54
90
Beta minus decay emits a positron so a proton is changed to a neutron in this process. This means that caesium 137 decays to Xenon 137