"268+268等于多少"...268+268等于多少

　"268+682等于几"...268+682等于几

　"268+298等于几"...268+298等于几

　"268-198等于几"...268-198等于几

　"268+342等于几"...268+342等于几

　"286等于几"...286等于几

　"268+107等于多少"...268+107等于多少

　"268+138等于几"...268+138等于几

　"268+128等于几"...268+128等于几

　"2468等于多少"...2468等于多少