"467-288等于多少"...467-288等于多少

　"467-278等于几"...467-278等于几

　"467-387等于几"...467-387等于几

　"684+278等于几"...684+278等于几

　"467-267等于几"...467-267等于几

　"467-279等于几"...467-279等于几

　"287+499等于几"...287+499等于几

　"476-283等于几"...476-283等于几

　"458+276等于几"...458+276等于几

　"477-288等于几"...477-288等于几