题目内容
计算1200-(1200-1200×
)÷0.375.
| 3 | 4 |
分析:0.375=
,除以一个分数,等于乘以这个分数的倒数;有公因式的提取公因式.然后求解.
| 3 |
| 8 |
解答:解:1200-(1200-1200×
)÷0.375,
=1200-1200×(1-
)÷
,
=1200-1200×
×
,
=1200×(1-
),
=1200×
,
=400.
| 3 |
| 4 |
=1200-1200×(1-
| 3 |
| 4 |
| 3 |
| 8 |
=1200-1200×
| 1 |
| 4 |
| 8 |
| 3 |
=1200×(1-
| 2 |
| 3 |
=1200×
| 1 |
| 3 |
=400.
点评:此题考查了分数的简便计算.
练习册系列答案
相关题目