一块圆形塑料板，切3刀最多能切几块？切4刀呢？7U2J*y0}5Q:q4T3E
算式：提示;[6`(y7h6l1B3p*@:g,};I7U2J*y0}5Q:q4T3E
答：切3刀最多能切5y)q-I-g+N'q;r2[;Z+W块，切4刀能切.U(G0B7i/w块。7U2J*y0}5Q:q4T3E