题目内容
(1)(
|
(2)
| ||||||||||||
(3)
|
(4)5-
|
分析:(1)先算减法,再算除法;
(2)先算减法,再算除法
(3)先算乘法和加法,再算减法;
(4)根据减法的性质进行简算.
(2)先算减法,再算除法
(3)先算乘法和加法,再算减法;
(4)根据减法的性质进行简算.
解答:解:
(1)(
-
)÷
,
=
÷
,
=
;
(2)
÷(
-
),
=
÷
,
=3;
(3)
×4-(
+
),
=
-
,
=
;
(4)5-
-0.125,
=5-(
+0.125),
=5-1,
=4.
(1)(
| 3 |
| 8 |
| 1 |
| 4 |
| 3 |
| 8 |
=
| 1 |
| 8 |
| 3 |
| 8 |
=
| 1 |
| 3 |
(2)
| 3 |
| 8 |
| 3 |
| 8 |
| 1 |
| 4 |
=
| 3 |
| 8 |
| 1 |
| 8 |
=3;
(3)
| 5 |
| 6 |
| 7 |
| 8 |
| 2 |
| 3 |
=
| 10 |
| 3 |
| 37 |
| 24 |
=
| 43 |
| 24 |
(4)5-
| 7 |
| 8 |
=5-(
| 7 |
| 8 |
=5-1,
=4.
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定律简便计算.
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