"3984+3984等于几"...3984+3984等于几

　"7825-3986等于几"...7825-3986等于几

　"3996+7104等于几"...3996+7104等于几

　"7983-4258等于几"...7983-4258等于几

　"3478+5796等于几"...3478+5796等于几

　"394+5477等于几"...394+5477等于几

　"398+497等于几"...398+497等于几

　"3678+4739等于多少"...3678+4739等于多少

　"498-383等于几"...498-383等于几

　"457-398等于几"...457-398等于几