题目内容
一种商品,先降价
,再提价
,现价比原价低.______.(判断对错)
| 1 |
| 10 |
| 1 |
| 10 |
(1-
)×(1+
),
=
×
,
=
;
<1,现价比原价低.
故答案为:正确.
| 1 |
| 10 |
| 1 |
| 10 |
=
| 9 |
| 10 |
| 11 |
| 10 |
=
| 99 |
| 100 |
| 99 |
| 100 |
故答案为:正确.
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