四则混合运算指的是哪四个

简介：A ray of purple light broke through the sky and headed towards the Black Stone Mountain. He was trembling with fear along the way. He was afraid that Li Dao would find his traces, so he tried his best to hide himself. After taking many detours, he quietly landed on the island. Chen Wuji immediately walked towards the stone house and came to the place where the old man named Lin lived.