"637+268等于几"...637+268等于几

　"637-269等于几"...637-269等于几

　"673-524等于几"...673-524等于几

　"635+197等于几"...635+197等于几

　"657-269等于几"...657-269等于几

　"675+239等于几"...675+239等于几

　"657+243等于几"...657+243等于几

　"632+275等于几"...632+275等于几

　"638+257等于几"...638+257等于几

　"678-259等于几"...678-259等于几