题目内容
-1
÷
×(-0.2)×1
÷1.4×(-
).
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 5 |
分析:把带分数互为假分数,小数化为分数,再把除法转化为乘法,然后根据有理数的乘法运算法则进行计算即可得解.
解答:解:-1
÷
×(-0.2)×1
÷1.4×(-
),
=-
×
×(-
)×
×
×(-
),
=-
×
×
×
×
×
,
=-0.3.
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| 2 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 5 |
=-
| 3 |
| 2 |
| 4 |
| 3 |
| 1 |
| 5 |
| 7 |
| 4 |
| 5 |
| 7 |
| 3 |
| 5 |
=-
| 3 |
| 2 |
| 4 |
| 3 |
| 1 |
| 5 |
| 7 |
| 4 |
| 5 |
| 7 |
| 3 |
| 5 |
=-0.3.
点评:本题考查了有理数的除法,有理数的乘法,熟记运算法则是解题的关键.
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