+8,2분의10 -4,-3분의6 +8,-4,2분의10,0,-3분의6 +7,+7분의21 -6.5,-4분의3,-8 -6.5,+7,0,-4분의3,-8,+7분의21 -6.5,-4분의3 3개 9 OOOX/A=-2,5(또는-2분의5),B:
당신은 어느 그룹입니까?