题目内容
(
+
)+(
-
)-(
+
)
(
+
+
+
)×(1-
)
[(
-
÷2)×
+1÷6
]÷
.
| 2 |
| 3 |
| 1 |
| 5 |
| 2 |
| 3 |
| 12 |
| 17 |
| 1 |
| 5 |
| 5 |
| 17 |
(
| 4 |
| 9 |
| 5 |
| 13 |
| 5 |
| 9 |
| 8 |
| 13 |
| 91 |
| 100 |
[(
| 1 |
| 4 |
| 1 |
| 4 |
| 8 |
| 13 |
| 1 |
| 2 |
| 1 |
| 100 |
分析:运用四则混合运算的顺序进行计算即可,先计算括号内部的再计算括号外面的.
解答:解:(1)(
+
)+(
-
)-(
+
),
=
+
-
-
-
,
=
-(
+
),
=
-1,
=
;
(2)(
+
+
+
)×(1-
),
=2×
,
=
;
(3)[(
-
÷2)×
+1÷6
]÷
,
=[
+
]×100,
=
.
| 2 |
| 3 |
| 1 |
| 5 |
| 2 |
| 3 |
| 12 |
| 17 |
| 1 |
| 5 |
| 5 |
| 17 |
=
| 4 |
| 3 |
| 1 |
| 5 |
| 12 |
| 17 |
| 1 |
| 5 |
| 5 |
| 17 |
=
| 4 |
| 3 |
| 12 |
| 17 |
| 5 |
| 17 |
=
| 4 |
| 3 |
=
| 1 |
| 3 |
(2)(
| 4 |
| 9 |
| 5 |
| 13 |
| 5 |
| 9 |
| 8 |
| 13 |
| 91 |
| 100 |
=2×
| 9 |
| 100 |
=
| 9 |
| 50 |
(3)[(
| 1 |
| 4 |
| 1 |
| 4 |
| 8 |
| 13 |
| 1 |
| 2 |
| 1 |
| 100 |
=[
| 1 |
| 13 |
| 2 |
| 13 |
=
| 300 |
| 13 |
点评:本题考查了学生通过约分对分数四则混合运题目进行简算的能力.
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