"634-267等于几"...634-267等于几

　"636-278等于几"...636-278等于几

　"634-376等于几"...634-376等于几

　"633+33等于几"...633+33等于几

　"634-267+356等于几"...634-267+356等于几

　"636-378等于几"...636-378等于几

　"636+67等于几"...636+67等于几

　"631-287等于几"...631-287等于几

　"635-274等于几"...635-274等于几

　"636+247等于几"...636+247等于几