题目内容
计算
(
-
)×
÷
÷
-
×
(
÷
-
)×
.
(
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
| 9 |
| 25 |
| 3 |
| 5 |
| 2 |
| 7 |
| 7 |
| 10 |
(
| 10 |
| 7 |
| 5 |
| 14 |
| 11 |
| 8 |
| 4 |
| 7 |
分析:(1)先算减法,再算乘法,最后算除法;
(2)先算除法和乘法,再算减法;
(3)先算除法,再算减法,最后算乘法.
(2)先算除法和乘法,再算减法;
(3)先算除法,再算减法,最后算乘法.
解答:解:
(1)(
-
)×
÷
,
=
×
÷
,
=
÷
,
=
;
(2)
÷
-
×
,
=
-
,
=
;
(3)(
÷
-
)×
,
=(4-
)×
,
=
×
,
=
.
(1)(
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 3 |
=
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
=
| 1 |
| 6 |
| 1 |
| 3 |
=
| 1 |
| 2 |
(2)
| 9 |
| 25 |
| 3 |
| 5 |
| 2 |
| 7 |
| 7 |
| 10 |
=
| 3 |
| 5 |
| 1 |
| 5 |
=
| 2 |
| 5 |
(3)(
| 10 |
| 7 |
| 5 |
| 14 |
| 11 |
| 8 |
| 4 |
| 7 |
=(4-
| 11 |
| 8 |
| 4 |
| 7 |
=
| 21 |
| 8 |
| 4 |
| 7 |
=
| 3 |
| 2 |
点评:此题主要考查分数的四则混合运算的运算顺序,然后根据运算顺序进行计算.
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