Question

1,2+2,3+3,4+4,5+5,6+6,7+7,8

Answer 1

1,2+2,3+3,4+4,5+5,6+6,7+7,8= 31,5

Answer 2

1,2+3,3+3,4+4,5+5,6+6,7+7,8=31,5