六年级上册数学】 分数简便计算

六年级上册数学】 分数简便计算


简介:
36×(-+) =36×-36×+36× =9-6+12 =15 2000× =(2000+1)× =2000×+1× =1999+ =1999 ×35-3× =×(35-3) =×32 =28 ×+× =×(+) =× =