题目内容
28千米增加它的
后再减少它的
是______千米.
| 1 |
| 7 |
| 1 |
| 7 |
28×(1+
)×(1-
),
=28×
×
,
=32×
,
=27
(千米).
答:是27
千米.
| 1 |
| 7 |
| 1 |
| 7 |
=28×
| 8 |
| 7 |
| 6 |
| 7 |
=32×
| 6 |
| 7 |
=27
| 3 |
| 7 |
答:是27
| 3 |
| 7 |
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