题目内容
(1)
|
(2)
| ||||||||||||||||
(3)(
|
(4)
| ||||||||||||||||
(5)
|
(6)
|
分析:(1)先算乘法,再算加法;
(2)先算除法,再算乘法,最后算减法;
(3)先算减法,再算乘法,最后算除法;
(4)先算除法和加法,再算乘法;
(5)先算除法,再算减法,最后算加法;
(6)先算减法,再算除法,最后算乘法.
(2)先算除法,再算乘法,最后算减法;
(3)先算减法,再算乘法,最后算除法;
(4)先算除法和加法,再算乘法;
(5)先算除法,再算减法,最后算加法;
(6)先算减法,再算除法,最后算乘法.
解答:解:
(1)
+
×
,
=
+
,
=
;
(2)
-
×(
÷
),
=
-
×
,
=
-
,
=
;
(3)(
-
)×
÷
,
=
×
÷
,
=
÷
,
=1;
(4)
÷
×(
+
),
=
×
,
=
;
(5)
-
+
÷
,
=
-
+
,
=
+
,
=
;
(6)
÷(
-
)×
,
=
÷
×
,
=
×
,
=
.
(1)
| 5 |
| 6 |
| 5 |
| 3 |
| 4 |
| 5 |
=
| 5 |
| 6 |
| 4 |
| 3 |
=
| 13 |
| 6 |
(2)
| 5 |
| 8 |
| 1 |
| 4 |
| 8 |
| 9 |
| 2 |
| 3 |
=
| 5 |
| 8 |
| 1 |
| 4 |
| 4 |
| 3 |
=
| 5 |
| 8 |
| 1 |
| 3 |
=
| 7 |
| 24 |
(3)(
| 1 |
| 2 |
| 1 |
| 6 |
| 3 |
| 5 |
| 1 |
| 5 |
=
| 1 |
| 3 |
| 3 |
| 5 |
| 1 |
| 5 |
=
| 1 |
| 5 |
| 1 |
| 5 |
=1;
(4)
| 1 |
| 6 |
| 9 |
| 17 |
| 3 |
| 4 |
| 2 |
| 3 |
=
| 17 |
| 54 |
| 17 |
| 12 |
=
| 289 |
| 648 |
(5)
| 11 |
| 12 |
| 1 |
| 4 |
| 3 |
| 10 |
| 3 |
| 5 |
=
| 11 |
| 12 |
| 1 |
| 4 |
| 1 |
| 2 |
=
| 2 |
| 3 |
| 1 |
| 2 |
=
| 7 |
| 6 |
(6)
| 2 |
| 3 |
| 3 |
| 4 |
| 1 |
| 2 |
| 4 |
| 5 |
=
| 2 |
| 3 |
| 1 |
| 4 |
| 4 |
| 5 |
=
| 8 |
| 3 |
| 4 |
| 5 |
=
| 32 |
| 15 |
点评:考查了分数四则混合运算.注意运算顺序和运算法则,然后再进一步计算.
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