题目内容
怎样算简便就怎样算.
4-
|
|
36×(
|
|
分析:(1)4-
-
,根据减法的运算性质进行简算;
(2)
×58+42÷8,把除数转化为乘它的倒数,再运用乘法分配律进行简算;
(3)36×(
+
-
),运用乘法分配律进行简算;
(4)
×
÷
,把除数转化为乘它的倒数,再根据分数乘法的计算法则进行计算.
| 5 |
| 11 |
| 6 |
| 11 |
(2)
| 1 |
| 8 |
(3)36×(
| 2 |
| 3 |
| 1 |
| 6 |
| 3 |
| 4 |
(4)
| 4 |
| 9 |
| 1 |
| 5 |
| 4 |
| 5 |
解答:解:(1)4-
-
,
=4-(
+
),
=4-1,
=3;
(2)
×58+42÷8,
=(58+42)×
,
=100×
,
=12.5;
(3)36×(
+
-
),
=36×
+36×
-36×
,
=24+6-27,
=3;
(4)
×
÷
,
=
×
×
,
=
.
| 5 |
| 11 |
| 6 |
| 11 |
=4-(
| 5 |
| 11 |
| 6 |
| 11 |
=4-1,
=3;
(2)
| 1 |
| 8 |
=(58+42)×
| 1 |
| 8 |
=100×
| 1 |
| 8 |
=12.5;
(3)36×(
| 2 |
| 3 |
| 1 |
| 6 |
| 3 |
| 4 |
=36×
| 2 |
| 3 |
| 1 |
| 6 |
| 3 |
| 4 |
=24+6-27,
=3;
(4)
| 4 |
| 9 |
| 1 |
| 5 |
| 4 |
| 5 |
=
| 4 |
| 9 |
| 1 |
| 5 |
| 5 |
| 4 |
=
| 1 |
| 9 |
点评:此题考查的目的是灵活运用减法的运算性质、乘法的运算定律对分数四则混合运算进行简便计算.
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