A Partial Sum is a Sum of Part of a Sequence. You must have a sequence to find the partial sum. The regular sum of 67 + 85 is 152.
85+15=100
78 + 85 = 163
111
342 is the sum.
85
2
85 & 86 85 & 86
They are: 83+2 = 85
85
179
That would be 24 and 61, sum: 24+61=85 and 61-24=37