题目内容
团结村修一条公路,第一天修了全长的
,第二天修了余下的
,第三天修了120米,此时刚好修完,问这条公路全长多少米?
| 4 |
| 7 |
| 3 |
| 5 |
120÷[1-
-(1-
)×
],
=120÷[1-
-
×
],
=120÷[1-
-
],
=120÷[
-
],
=120÷
,
=700(米),
答:这条公路全长700米.
| 4 |
| 7 |
| 4 |
| 7 |
| 3 |
| 5 |
=120÷[1-
| 4 |
| 7 |
| 3 |
| 7 |
| 3 |
| 5 |
=120÷[1-
| 4 |
| 7 |
| 9 |
| 35 |
=120÷[
| 3 |
| 7 |
| 9 |
| 35 |
=120÷
| 6 |
| 35 |
=700(米),
答:这条公路全长700米.
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