题目内容
(2012?中山市模拟)1
-[(3.62×
+6.38÷7
)×1.82-1
×0.82].
| 2 |
| 3 |
| 2 |
| 15 |
| 1 |
| 2 |
| 1 |
| 3 |
分析:完成本题可先根据分数除法的运算法则将式中的除法算式变为乘法算式后,将括号中的算式连续运用乘法分配律计算.
解答:解:1
-[(3.62×
+6.38÷7
)×1.82-1
×0.82]
=1
-[(3.62×
+6.38×
)×1.82-1
×0.82],
=1
-[(3.62+6.38)×
×1.82-1
×0.82],
=1
-[10×
×1.82-1
×0.82],
=1
-[1
×1.82-1
×0.82],
=1
-[(1.82-0.82)×1
],
=1
-1×1
,
=1
-1
,
=
.
| 2 |
| 3 |
| 2 |
| 15 |
| 1 |
| 2 |
| 1 |
| 3 |
=1
| 2 |
| 3 |
| 2 |
| 15 |
| 2 |
| 15 |
| 1 |
| 3 |
=1
| 2 |
| 3 |
| 2 |
| 15 |
| 1 |
| 3 |
=1
| 2 |
| 3 |
| 2 |
| 15 |
| 1 |
| 3 |
=1
| 2 |
| 3 |
| 1 |
| 3 |
| 1 |
| 3 |
=1
| 2 |
| 3 |
| 1 |
| 3 |
=1
| 2 |
| 3 |
| 1 |
| 3 |
=1
| 2 |
| 3 |
| 1 |
| 3 |
=
| 1 |
| 3 |
点评:完成本题要注意分析式中数据的特点及内在联系,然后运用合适的方法进行计算.
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