问题 解答题
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
)
答案

(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

填空题
单项选择题 A1型题