问题
解答题
求比值. 45%:4.5 0.9:0.36
|
答案
(1)45%:4.5,
=0.45:4.5,
=0.45÷4.5,
=0.1;
(2)0.9:0.36,
=0.9÷0.36,
=2.5;
(3)
:14 7
,1 7
=
÷4 7
,8 7
=
×4 7
,7 8
=
;1 2
(4)
吨:375千克,1 4
=0.25吨:375千克,
=250千克:375千克,
=250÷375,
=
.2 3