题目内容

计算,能简算的要简算.
6.12+
3
7
+2.88+
4
7
29
24
-(
5
24
-
4
9
)
7
15
+
7
12
+
8
15
-
7
12
15
11
-
3
8
-
5
8
5
6
+
7
9
+
3
8
5
8
-
2
5
+
1
4
14
15
-(
2
3
-
1
5
)
19
20
+(
4
5
-
7
40
)
.
(1)6.12+
3
7
+2.88+
4
7
,
=(6.12+2.88)+(
3
7
+
4
7
),
=9+1,
=10;

(2)
29
24
-(
5
24
-
4
9
),
=
29
24
-
5
24
+
4
9
,
=1+
4
9
,
=1
4
9
;

(3)
7
15
+
7
12
+
8
15
-
7
12
,
=(
7
15
+
8
15
)+(
7
12
-
7
12
),
=1+0,
=1;

(4)
15
11
-
3
8
-
5
8
,
=
15
11
-(
3
8
+
5
8
),
=
15
11
-1,
=
4
11
;

(5)
5
6
+
7
9
+
3
8
,
=
60
72
+
56
72
+
27
72
,
=
143
72
;

(6)
5
8
-
2
5
+
1
4
,
=
25
40
-
16
40
+
10
40
,
=
19
40
;

(7)
14
15
-(
2
3
-
1
5
)
,
=
14
15
-
7
15
,
=
7
15
;

(8)
19
20
+(
4
5
-
7
40
)
,
=
19
20
-
25
40
,
=
13
40
.
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