五年级上册数学简便计算专项训练

五年级上册数学简便计算专项训练

  • 简介

    3.07-0.38-1.62 (减法的性质) =3.07-(0.38+1.62) =3.07-2 =1.07 1.29+3.7+2.71+6.3 (加法交换律和加法结合律) =(1.29+2.71)+(3.7+6.3) =4+10 =14 3.25+1.79-0.59+1.75 (同级运算交换) =(3.25+1.75)+(1.79-0.59) =5+1.2 =6.2

五年级上册数学简便计算专项训练