题目内容
计算:
(1)8+(-10)+(-2)-(-5)
(2)(+
)+(-2
)-(-2
)-(+3
)
(3)(
-
-
)×24
(4)-14-2×(-3)2÷(-
)
(1)8+(-10)+(-2)-(-5)
(2)(+
| 1 |
| 4 |
| 1 |
| 3 |
| 3 |
| 4 |
| 2 |
| 3 |
(3)(
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
(4)-14-2×(-3)2÷(-
| 1 |
| 6 |
考点:有理数的混合运算
专题:
分析:(1)利用有理数混合运算顺序计算即可,
(2)利用加法交换律运算即可,
(3)利用乘法分配律运算,
(4)利用有理数混合运算顺序计算即可.
(2)利用加法交换律运算即可,
(3)利用乘法分配律运算,
(4)利用有理数混合运算顺序计算即可.
解答:解:(1)8+(-10)+(-2)-(-5)
=-2+(-2)+5,
=1,
(2)(+
)+(-2
)-(-2
)-(+3
)
=(+
)+2
+(-2
)-3
,
=3-6,
=-3,
(3)(
-
-
)×24
=
×24-
×24-
×24,
=9-4-18,
=-13,
(4)-14-2×(-3)2÷(-
)
=-1-18×(-6),
=107.
=-2+(-2)+5,
=1,
(2)(+
| 1 |
| 4 |
| 1 |
| 3 |
| 3 |
| 4 |
| 2 |
| 3 |
=(+
| 1 |
| 4 |
| 3 |
| 4 |
| 1 |
| 3 |
| 2 |
| 3 |
=3-6,
=-3,
(3)(
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
=
| 3 |
| 8 |
| 1 |
| 6 |
| 3 |
| 4 |
=9-4-18,
=-13,
(4)-14-2×(-3)2÷(-
| 1 |
| 6 |
=-1-18×(-6),
=107.
点评:本题主要考查了有理数的混合运算,解题的关键是有理数混合运算顺序.
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