题目内容
计算下面各题,能简算的简算.
(
+
-
)×24
7
÷[1
÷(4
-
)]
×
+
÷1
[(
+
)÷
-
]÷
-
.
(
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 24 |
7
| 1 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 2 |
| 3 |
| 5 |
| 2 |
| 3 |
| 2 |
| 5 |
| 1 |
| 2 |
[(
| 1 |
| 2 |
| 2 |
| 3 |
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 7 |
| 1 |
| 3 |
考点:分数的四则混合运算
专题:运算顺序及法则
分析:①运用出发点分配律进行计算即可.
②③④根据四则混合运算的运算顺序计算即可.
②③④根据四则混合运算的运算顺序计算即可.
解答:
解:①(
+
-
)×24
=24×
+24×
-
×24
=8+6-1
=13
②7
÷[1
÷(4
-
)]
=7
÷[
×
]
=
×
=24
③
×
+
÷1
=
+
=
=
④[(
+
)÷
-
]÷
-
=[(
+
)×
-
]×7-
=[
-
]×7-
=
×7-
=
=7
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 24 |
=24×
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 24 |
=8+6-1
=13
②7
| 1 |
| 3 |
| 1 |
| 4 |
| 2 |
| 3 |
| 1 |
| 2 |
=7
| 1 |
| 3 |
| 5 |
| 4 |
| 6 |
| 25 |
=
| 22 |
| 3 |
| 10 |
| 3 |
=24
| 4 |
| 9 |
③
| 3 |
| 5 |
| 2 |
| 3 |
| 2 |
| 5 |
| 1 |
| 2 |
=
| 2 |
| 5 |
| 4 |
| 15 |
=
| 10 |
| 15 |
=
| 2 |
| 3 |
④[(
| 1 |
| 2 |
| 2 |
| 3 |
| 5 |
| 6 |
| 1 |
| 3 |
| 1 |
| 7 |
| 1 |
| 3 |
=[(
| 1 |
| 2 |
| 2 |
| 3 |
| 6 |
| 5 |
| 1 |
| 3 |
| 1 |
| 3 |
=[
| 7 |
| 5 |
| 1 |
| 3 |
| 1 |
| 3 |
=
| 16 |
| 15 |
| 1 |
| 3 |
=
| 107 |
| 15 |
=7
| 2 |
| 15 |
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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