题目内容
一杯牛奶先喝去
又加满水;再喝去
又加满水;再喝去
又加满水.问牛奶是水的几分之几?
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
1-
-(1-
)×
-[1-
-(1-
)×
]×
,
=
-
×
-(
-
×
)×
,
=
-
-
×
,
=
-
,
=
.
76÷(125-76)
=76÷49,
=
.
答:此时牛奶是水的
.
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
=
| 4 |
| 5 |
| 4 |
| 5 |
| 1 |
| 5 |
| 4 |
| 5 |
| 4 |
| 5 |
| 1 |
| 5 |
| 1 |
| 5 |
=
| 4 |
| 5 |
| 4 |
| 25 |
| 4 |
| 25 |
| 1 |
| 5 |
=
| 16 |
| 25 |
| 4 |
| 125 |
=
| 76 |
| 125 |
76÷(125-76)
=76÷49,
=
| 76 |
| 49 |
答:此时牛奶是水的
| 76 |
| 49 |
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