题目内容
(2012?陆良县模拟)18÷1.5-
×0.2
40000-82620÷27
829380÷138-2004×0.505
1÷[(3
-2
)×
]
8.4-1
×2
÷2
÷
+0.17.
| 1 |
| 2 |
40000-82620÷27
829380÷138-2004×0.505
1÷[(3
| 1 |
| 2 |
| 1 |
| 6 |
| 3 |
| 4 |
8.4-1
| 2 |
| 3 |
| 2 |
| 5 |
| 2 |
| 3 |
| 3 |
| 4 |
分析:本题根据四则混合运算的运算顺序计算即可,先算乘除,再算加减,有括号的要先算括号里面的.
解答:解:(1)18÷1.5-
×0.2
=12-0.1,
=11.9;
(2)40000-82620÷27
=40000-3060,
=36940;
(3)829380÷138-2004×0.505
=6010-1012.02,
=4997.98;
(4)1÷(3
-2
)×
=1÷
,
=
;
(5)8.4-1
×2
÷2
÷
+0.17
=8.4-
×
×
×
+0.17,
=8.4-2+0.17,
=6.57.
| 1 |
| 2 |
=12-0.1,
=11.9;
(2)40000-82620÷27
=40000-3060,
=36940;
(3)829380÷138-2004×0.505
=6010-1012.02,
=4997.98;
(4)1÷(3
| 1 |
| 2 |
| 1 |
| 6 |
| 3 |
| 4 |
=1÷
| 4 |
| 3 |
=
| 3 |
| 4 |
(5)8.4-1
| 2 |
| 3 |
| 2 |
| 5 |
| 2 |
| 3 |
| 3 |
| 4 |
=8.4-
| 5 |
| 3 |
| 12 |
| 5 |
| 3 |
| 8 |
| 4 |
| 3 |
=8.4-2+0.17,
=6.57.
点评:本题中的数据较为复杂,并且不能运用简便方法计算,因此完成时要细心,注意数位的变化及通分约分.
练习册系列答案
相关题目