小明做对了14道题,小红做对了17道题,小强只做对了9道题,他们一共做对了多少道题?5U'v/v4D8{'Y-K-l,c1J
算式:提示2S(_9i9j*c7B*s/T.d;w/p0d8E)I5U'v/v4D8{'Y-K-l,c1J
答:他们一共做对了:g2O)P9[6Q;T:Y5i3c道题。5U'v/v4D8{'Y-K-l,c1J