化简比、求比值. 140/35 0.4:2/3 0.3吨:150千克 0.6:2/3.
问题描述:
化简比、求比值.
140 35
0.4:
2 3
0.3吨:150千克
0.6:
. 2 3
答
(1)
=140:35,140 35
=(140÷35):(35÷35),
=4:1;
=140÷35=4;140 35
(2)0.4:
,2 3
=
:2 5
,2 3
=(
×2 5
):(15 2
×2 3
),15 2
=3:5;
0.4:
=0.4÷2 3
,2 3
=0.4×
,3 2
=0.6;
(3)0.3吨:150千克,
=300:150,
=(300÷150):(150÷150),
=2:1;
0.3吨:150千克,
=300:150,
=300÷150,
=2;
(4)0.6:
,2 3
=
:3 5
,2 3
=(
×15):(3 5
×15),2 3
=9:10;
0.6:
,2 3
=0.6÷
,2 3
=0.6×
,3 2
=0.9.