What's the sum of 7+10?
the sum of 7+10 is 17
7+10 = Solution Lets suppose there are 7 ball. After half an hour you add 10 ball to the pile. Now we have 7+10 = 17 balls in total. 0000000 = 7 balls + 0000000000 = 10 balls = 00000000000000000 = 17 balls total