某小学举行一次数学竞赛,试卷上共有10道题,每做对一题得10分,做错一题扣4分,小明共得了72分,他错了几道?:c-_.D7u
算式:提示,s6C*^4W0I+M6y*E;y*}.C-S,|:r:c-_.D7u
答:他错了'r)x3G,k,R道题。:c-_.D7u