10个西瓜，送个解放军叔叔7个，还剩下多少个西瓜？/\9y;L-['p/L'W5Q4R)p
算式：提示-C3c'o+y5H9v:K/\9y;L-['p/L'W5Q4R)p
答：还剩下3|0z(K(u-a/B*o3t5I'D+I个西瓜。/\9y;L-['p/L'W5Q4R)p