四则混合运算指的是哪四个

简介：The old man Huangsha took out a few yellow jade stones that contained a touch of aura from his arms, which were somewhat similar to the sapphire essence in Li Dao's hand. He also found a white jade plate in a corner of the cave. This jade plate was square in shape, about one foot long. It has a long diameter, is engraved with dense lines, and has four grooves at each of the four diagonal corners.