题目内容
一件衣服,先提价
再降价
,最后售价与原价相同.______.
| 2 |
| 5 |
| 2 |
| 5 |
原价:1,
现价:(1+
)×(1-
),
=
×
,
=
.
答:现价是
.
故答案为:×.
现价:(1+
| 2 |
| 5 |
| 2 |
| 5 |
=
| 7 |
| 5 |
| 3 |
| 5 |
=
| 21 |
| 25 |
答:现价是
| 21 |
| 25 |
故答案为:×.
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| 2 |
| 5 |
| 2 |
| 5 |
| 2 |
| 5 |
| 2 |
| 5 |
| 7 |
| 5 |
| 3 |
| 5 |
| 21 |
| 25 |
| 21 |
| 25 |