问题
解答题
化简下面各比,并求出比值.
|
答案
(1)25:100,
=(25÷25):(100÷25),
=1:4;
25:100,
=25÷100,
=0.25,
(2)
:12 5
,8 15
=(
×12 5
):(15 4
×8 15
),15 4
=9:2,
:12 5
,8 15
=
÷12 5
,8 15
=
,9 2
(3)0.9:0.36,
=(0.9×100):(0.36×100),
=90:36,
=(90÷18):(36÷18),
=5:2,
0.9:0.36,
=0.9÷0.36,
=2.5;
(4)
吨:375千克,1 4
=250千克:375千克,
=250:375,
=(250÷125):(375÷125),
=2:3,
吨:375千克,1 4
=250千克:375千克,
=250:375,
=250÷375,
=
.2 3
比 | 25:100 |
| 0.9:0.36 |
| ||||||
最简整数比 | 1:4 | 9:2 | 5:2 | 2:3 | ||||||
比值 | 0.25 |
| 2.5 |
|