"7825-3986等于几"...7825-3986等于几

　"3984+3984等于几"...3984+3984等于几

　"3996+7104等于几"...3996+7104等于几

　"398+574等于几"...398+574等于几

　"3678+4739等于多少"...3678+4739等于多少

　"3478+5796等于几"...3478+5796等于几

　"398+597等于几"...398+597等于几

　"7983-4258等于几"...7983-4258等于几

　"3998+988等于几"...3998+988等于几

　"398+497等于几"...398+497等于几