题目内容
用自己喜欢的方式计算
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分析:(1)(3)(5)(6)按照先算括号里面的,再算括号外面的顺序解答;
(2)(4)(7)(8)按照从左到右顺序解答.
(2)(4)(7)(8)按照从左到右顺序解答.
解答:解:(1)
-(
-
)
=
-
=
;
(2)
+
-
=
-
=
;
(3)
-(
+
)
=
-
=0;
(4)
-
+
=
+
=
;
(5)
+(
-
)
=
+
=
;
(6)
-(
+
)
=
-
=
;
(7)
+
-
=
-
=
;
(8)
+
-
=
-
=
.
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 8 |
=
| 1 |
| 2 |
| 3 |
| 8 |
=
| 1 |
| 8 |
(2)
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 6 |
=
| 3 |
| 4 |
| 1 |
| 6 |
=
| 7 |
| 12 |
(3)
| 5 |
| 6 |
| 1 |
| 2 |
| 1 |
| 3 |
=
| 5 |
| 6 |
| 5 |
| 6 |
=0;
(4)
| 7 |
| 8 |
| 5 |
| 12 |
| 1 |
| 6 |
=
| 11 |
| 24 |
| 1 |
| 6 |
=
| 5 |
| 8 |
(5)
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 4 |
=
| 2 |
| 3 |
| 1 |
| 4 |
=
| 11 |
| 12 |
(6)
| 4 |
| 3 |
| 2 |
| 5 |
| 3 |
| 10 |
=
| 4 |
| 3 |
| 7 |
| 10 |
=
| 19 |
| 30 |
(7)
| 5 |
| 7 |
| 1 |
| 4 |
| 9 |
| 14 |
=
| 27 |
| 28 |
| 9 |
| 14 |
=
| 9 |
| 28 |
(8)
| 3 |
| 4 |
| 3 |
| 6 |
| 5 |
| 8 |
=
| 5 |
| 4 |
| 5 |
| 8 |
=
| 5 |
| 8 |
点评:本题考查知识点:依据四则运算计算方法正确进行计算.
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