"638+192等于几"...638+192等于几

　"638+297等于几"...638+297等于几

　"638+93等于几"...638+93等于几

　"638-374等于几"...638-374等于几

　"638+287等于几"...638+287等于几

　"638+362等于几"...638+362等于几

　"638-549等于几"...638-549等于几

　"638+8103等于几"...638+8103等于几

　"638+93等于"...638+93等于

　"638+94等于几"...638+94等于几