二班有60把椅子,三班有30把椅子,二班比三班多多少把椅子?+[1e8M*B/r/[9r:v,t-g
算式:提示6N/O9G8O:S+s(a5G+[1e8M*B/r/[9r:v,t-g
答:二班比三班多(c+b6K9g/v5V6w,j8r把椅子。+[1e8M*B/r/[9r:v,t-g