"638+287等于几"...638+287等于几

　"638+297等于几"...638+297等于几

　"638-549等于几"...638-549等于几

　"638+74等于几"...638+74等于几

　"638+362等于几"...638+362等于几

　"638+93等于几"...638+93等于几

　"634-376等于几"...634-376等于几

　"632-385等于几"...632-385等于几

　"638+93等于"...638+93等于

　"632+478等于几"...632+478等于几