题目内容
下面各题,怎样简便就怎样算.
÷
×
÷
÷[(
-
)÷
]
×
+
÷35
[
-(
-
)]×
.
| 1 |
| 8 |
| 3 |
| 4 |
| 2 |
| 3 |
| 4 |
| 5 |
| 3 |
| 7 |
| 3 |
| 4 |
| 2 |
| 5 |
| 7 |
| 12 |
| 7 |
| 12 |
| 1 |
| 35 |
| 5 |
| 12 |
[
| 11 |
| 15 |
| 7 |
| 12 |
| 2 |
| 5 |
| 15 |
| 14 |
分析:算式一二四据四则混合运算法则计算即可,算式三可据分配律进行简算.
解答:解:
÷
×
÷
=
×
×
×
,
=
;
÷[(
-
)÷
]
=
÷[
×
],
=
÷
,
=
;
×
+
÷35
=
×
-
×
,
=(
+
)×
,
=1×
,
=
;
[
-(
-
)]×
=[
-
]×
,
=
×
,
=
.
| 1 |
| 8 |
| 3 |
| 4 |
| 2 |
| 3 |
| 4 |
| 5 |
=
| 1 |
| 8 |
| 4 |
| 3 |
| 2 |
| 3 |
| 5 |
| 4 |
=
| 5 |
| 36 |
| 3 |
| 7 |
| 3 |
| 4 |
| 2 |
| 5 |
| 7 |
| 12 |
=
| 3 |
| 7 |
| 7 |
| 20 |
| 12 |
| 7 |
=
| 3 |
| 7 |
| 3 |
| 5 |
=
| 5 |
| 7 |
| 7 |
| 12 |
| 1 |
| 35 |
| 5 |
| 12 |
=
| 7 |
| 12 |
| 1 |
| 35 |
| 5 |
| 12 |
| 1 |
| 35 |
=(
| 7 |
| 12 |
| 5 |
| 12 |
| 1 |
| 35 |
=1×
| 1 |
| 35 |
=
| 1 |
| 35 |
[
| 11 |
| 15 |
| 7 |
| 12 |
| 2 |
| 5 |
| 15 |
| 14 |
=[
| 11 |
| 15 |
| 11 |
| 60 |
| 15 |
| 14 |
=
| 11 |
| 20 |
| 15 |
| 14 |
=
| 33 |
| 56 |
点评:完成此类题目要注意分析式中数据,看是否能简算,同时要注意通分、约分.
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