题目内容
计算下面各题.
|
|
| ||||||||||||||||||
5-
|
9÷
|
(
|
分析:(1)根据分数除法的计算方法进行计算;
(2)按照从左向右的顺序进行计算;
(3)按照从左向右的顺序进行计算;
(4)先算除法,再根据连减的性质进行简算;
(5)先算除法,再算减法;
(6)先算减法,再算除法.
(2)按照从左向右的顺序进行计算;
(3)按照从左向右的顺序进行计算;
(4)先算除法,再根据连减的性质进行简算;
(5)先算除法,再算减法;
(6)先算减法,再算除法.
解答:解:
(1)
÷
,
=
×
,
=
;
(2)
÷4÷
,
=
÷
,
=
;
(3)
×
÷
,
=
÷
,
=
;
(4)5-
÷
-
,
=5-
-
,
=5-(
+
),
=5-2,
=3;
(5)9÷
-
÷
,
=
-
,
=0;
(6)(
-
)÷
,
=
÷
,
=
.
(1)
| 7 |
| 18 |
| 5 |
| 9 |
=
| 7 |
| 18 |
| 9 |
| 5 |
=
| 7 |
| 10 |
(2)
| 7 |
| 10 |
| 14 |
| 5 |
=
| 7 |
| 40 |
| 14 |
| 5 |
=
| 1 |
| 16 |
(3)
| 1 |
| 4 |
| 8 |
| 9 |
| 9 |
| 10 |
=
| 2 |
| 9 |
| 9 |
| 10 |
=
| 20 |
| 81 |
(4)5-
| 7 |
| 15 |
| 1 |
| 3 |
| 3 |
| 5 |
=5-
| 7 |
| 5 |
| 3 |
| 5 |
=5-(
| 7 |
| 5 |
| 3 |
| 5 |
=5-2,
=3;
(5)9÷
| 6 |
| 7 |
| 7 |
| 6 |
| 1 |
| 9 |
=
| 21 |
| 2 |
| 21 |
| 2 |
=0;
(6)(
| 6 |
| 7 |
| 3 |
| 5 |
| 9 |
| 5 |
=
| 9 |
| 35 |
| 9 |
| 5 |
=
| 1 |
| 7 |
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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