在下面算式适当的地方填上+、-符号,使算式成立。2n0E/M9P:a.E3~,Z)T,u/i
(1)9 8 7 6 5 4 3 2 1 =232n0E/M9P:a.E3~,Z)T,u/i
算式:提示,x8r.[2y'l+N(G*o,I+W:l,v-y)O2n0E/M9P:a.E3~,Z)T,u/i
(2)9 8 7 6 5 4 3 2 1 =212n0E/M9P:a.E3~,Z)T,u/i
算式:提示6i8[3w;h:t(\5[2n0E/M9P:a.E3~,Z)T,u/i