如图所示,小朋友排队,小红前面四个人,后边三个人,问一共多少人?2B;X.n(|7Z9a8I9n3d*m-[;_;X6i/q
2B;X.n(|7Z9a8I9n3d*m-[;_;X6i/q
算式:提示'z;H3T.I;o6]1`*D0x2B;X.n(|7Z9a8I9n3d*m-[;_;X6i/q
答:一共有+Q)h+Z)\1H.?'z人。2B;X.n(|7Z9a8I9n3d*m-[;_;X6i/q