Respuesta :
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
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
