填空)S7X1_._;N,l/?5~
把10个○平均分成5份，每份是-o(t/o;~'p个。)S7X1_._;N,l/?5~
列出算式：,}9c1f6k+T÷-?/f1[4?;I:k-b=7?7X1w'o*j.b7j5~(W8X/T/T)S7X1_._;N,l/?5~