题目内容
简便计算:
-(
+
)
-
-
-
+
-
.
5 |
8 |
1 |
8 |
3 |
10 |
12 |
11 |
2 |
9 |
7 |
9 |
1 |
8 |
3 |
7 |
7 |
8 |
4 |
7 |
(1)
-(
+
),
=
-
-
,
=
-
,
=
;
(2)
-
-
,
=
-(
+
),
=
-1,
=
;
(3)
-
+
-
,
=(
+
)-(
+
),
=1-1,
=0.
5 |
8 |
1 |
8 |
3 |
10 |
=
5 |
8 |
1 |
8 |
3 |
10 |
=
1 |
2 |
3 |
10 |
=
1 |
5 |
(2)
12 |
11 |
2 |
9 |
7 |
9 |
=
12 |
11 |
2 |
9 |
7 |
9 |
=
12 |
11 |
=
1 |
11 |
(3)
1 |
8 |
3 |
7 |
7 |
8 |
4 |
7 |
=(
1 |
8 |
7 |
8 |
4 |
7 |
3 |
7 |
=1-1,
=0.
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