题目内容
80吨增加
后,再减少
,结果仍是80吨.______.
| 1 |
| 8 |
| 1 |
| 8 |
80×(1+
)×(1-
),
=80×
×
,
=90×
,
=78.75(吨),
78.75<80,
故答案为:错误.
| 1 |
| 8 |
| 1 |
| 8 |
=80×
| 9 |
| 8 |
| 7 |
| 8 |
=90×
| 7 |
| 8 |
=78.75(吨),
78.75<80,
故答案为:错误.
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