五年级上册数学【小数除法】简便运算
-
简介
①a÷b÷c=a÷(b×c) 3.52÷2.5÷0.4 =3.52÷(2.5×0.4) =3.52÷1 =3.52 ②a÷(b×c)=a÷b÷c 3.9÷(1.3×5) =3.9÷1.3÷5 =3÷5 =0.6 ③(a±b)÷c=a÷c±b÷c 150.15÷1.5 =(150+0.15)÷1.5 =150÷1.5+0.15÷1.5 =100+0.1 =100.1 ④a÷c±b÷c=(a±b)÷c 27÷4.5+18÷4.5 =(27+18)÷4.5 =45÷4.5 =10
本年级热门下载
同类热门下载