问题 解答题
列式计算,能简便运算的可以采用简便运算.
24×
3
4
×
5
6

3
4
÷
1
8
×
5
9

36×(
3
4
+
8
9
);
2
7
+
5
7
×
1
15

5
18
÷(
1
3
÷
5
6
);
28×
3
8
+28×
5
8
答案

(1)24×

3
4
×
5
6

=24×(

3
4
×
5
6
),

=24×

15
24

=15;

(2)

3
4
÷
1
8
×
5
9

=

3
4
×8×
5
9

=6×

5
9

=

10
3

(3)36×(

3
4
+
8
9
),

=36×

3
4
+36×
8
9

=27+32,

=59;

(4)

2
7
+
5
7
×
1
15

=

2
7
+
1
21

=

1
3

(5)

5
18
÷(
1
3
÷
5
6
),

=

5
18
÷
2
5

=

25
36

(6)28×

3
8
+28×
5
8

=28×(

3
8
+
5
8
),

=28×1,

=28.

填空题
单项选择题 B1型题