二年级加减法巧算.docx

文档介绍：,正确的选项是哪个?268+69+11268+(69+11)268+(69-11),正确的选项是哪个?268-69-11268-(69+11)268-(69-11),正确的选项是哪个?386-13-10-17386-(13+10+17)386-(13-10+17)386-(13-10-17),正确的选项是哪个?300-18-22-20300-(18+22-20)300-(18+22+20)300-(18-22+20),正确的选项是哪个?218+(12-19)218+12+19218+12-196..下面算式去掉括号后,正确的选项是哪个?-(13+10-17)-(18-22-20)268-(68+19+11)268-68-19-11268-68+19+11268-68-19+,正确的选项是哪个?268-(29-12+11)268-29-12-11268-29+12-11268-29+12+?36+49+419+37-968+76-18-1668+56+12-16-68+19--29-12+1119+36+11+1468-56+12+1668-16-18-1473-16-14+7