题目内容
怎样简便就怎样算
|
(
|
| ||||||||||||||||
|
1÷
|
4
|
分析:(1)根据乘法交换律进行简算;
(2)先算加法,再算除法;
(3)先算加法,再算除法;
(4)按照从左向右的顺序进行计算;
(5)按照从左向右的顺序进行计算;
(6)根据乘法分配律进行简算.
(2)先算加法,再算除法;
(3)先算加法,再算除法;
(4)按照从左向右的顺序进行计算;
(5)按照从左向右的顺序进行计算;
(6)根据乘法分配律进行简算.
解答:解:
(1)
×14÷
,
=
÷
×14,
=
×14,
=2;
(2)(
+
)÷
,
=
÷
,
=
;
(3)
÷(
+
),
=
÷
,
=
;
(4)
÷
÷
,
=
÷
,
=
;
(5)1÷
÷
,
=100÷
,
=10000;
(6)4
×4
-4
×3.6
=4
×(4
-3.6),
=4
×1,
=4
.
(1)
| 1 |
| 8 |
| 7 |
| 8 |
=
| 1 |
| 8 |
| 7 |
| 8 |
=
| 1 |
| 7 |
=2;
(2)(
| 4 |
| 5 |
| 3 |
| 10 |
| 3 |
| 10 |
=
| 11 |
| 10 |
| 3 |
| 10 |
=
| 11 |
| 3 |
(3)
| 5 |
| 6 |
| 1 |
| 2 |
| 5 |
| 6 |
=
| 5 |
| 6 |
| 4 |
| 3 |
=
| 5 |
| 8 |
(4)
| 3 |
| 4 |
| 15 |
| 16 |
| 5 |
| 6 |
=
| 4 |
| 5 |
| 5 |
| 6 |
=
| 24 |
| 25 |
(5)1÷
| 1 |
| 100 |
| 1 |
| 100 |
=100÷
| 1 |
| 100 |
=10000;
(6)4
| 4 |
| 5 |
| 3 |
| 5 |
| 4 |
| 5 |
=4
| 4 |
| 5 |
| 3 |
| 5 |
=4
| 4 |
| 5 |
=4
| 4 |
| 5 |
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算律简便计算.
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