每瓶矿泉水2元，买20瓶需要多少钱？7~0w0h'Z0P+T5w1]2t
算式：提示7`+f(V;w2`9W2Z0V(z)i*d2N'A5L7r7~0w0h'Z0P+T5w1]2t
答：需要;r7i9L+q+Y5A9f8z5d5e6F;c5A元。7~0w0h'Z0P+T5w1]2t