问题 解答题
脱式计算下面各题.(能简算的要简算)
6.4÷
8
9
×
5
24
              
5
42
×
24
25
÷
36
35
                 
(4-0.4)×(
2
9
+
2
3
10
19
÷
3
4
×
38
5
              
0.9×31-0.9×1[
3
8
-(
1
6
+
1
3
)]÷
1
12
答案

(1)6.4÷

8
9
×
5
24

=

32
5
×
9
8
×
5
24

=

3
2

(2)

5
42
×
24
25
÷
36
35

=

5
42
×
24
25
×
35
36

=

1
9

(3)(4-0.4)×(

2
9
+
2
3
),

=3.6×

8
9

=3.2;

(4)

10
19
÷
3
4
×
38
5

=

10
19
×
4
3
×
38
5

=

16
3

(5)0.9×31-0.9×1,

=0.9×(31-1),

=0.9×30,

=27;

(6)[

3
8
-(
1
6
+
1
3
)]÷
1
12

=[

3
8
-
1
2
1
12

=-

1
8
×12,

=-

3
2

多项选择题
单项选择题