文档介绍：,正确的选项是哪个?268+69++(69+11)+(69-11),正确的选项是哪个?268-69--(69+11)-(69-11),正确的选项是哪个?386-13-10--(13+10+17)-(13-10+17)-(13-10-17)-(13+10-17),正确的选项是哪个?300-18-22--(18+22-20)-(18+22+20)-(18-22+20)-(18-22-20),正确的选项是哪个?218+(12-19)+12++12-196..下面算式去掉括号后,正确的选项是哪个?268-(68+19+11)-68-19--68+19+-68-19+-68+19-,正确的选项是哪个?268-(29-12+11)-29-12--29+12--29+12+-29-12+?36+49+419+37-968+76-18-1668+56+12-1619+36+11+1468-56+12+1668-16-18-1473-16-14+7