问题 解答题 大8-你8,1-四9,大7+27,1四+1四,2大+1大,27+四7,四8-四8,你7+四7. 答案 48-38=14,1-49=49,47+27=1,14+14=12,24+14=34,27+47=67,48-48=0,37+47=1.