问题 解答题
计算下列各题.(能简算的要简算)
2
3
×
5
16
×
3
5
1
4
÷(
2
3
-
1
6
)
3
4
×
2
9
+0.75×
5
9
12.5%×
4
5
÷
1
8
5
7
÷[32×(1-37.5%)]
13
21
×17+8÷
21
17
答案

(1)

2
3
×
5
16
×
3
5

=

2
3
×
3
5
×
5
16

=

2
5
×
5
16

=

1
8

(2)

1
4
÷(
2
3
-
1
6
),

=

1
4
÷
1
2

=

1
2

(3)

3
4
×
2
9
+0.75×
5
9

=

3
4
×
2
9
+
3
4
×
5
9

=(

2
9
+
5
9
)×
3
4

=

7
9
×
3
4

=

7
12

(4)12.5%×

4
5
÷
1
8

=12.5%÷

1
8
×
4
5

=1×

4
5

=

4
5

(5)

5
7
÷[32×(1-37.5%)],

=

5
7
÷[32×0.625],

=

5
7
÷20,

=

1
28

(6)

13
21
×17+8÷
21
17

=

17
21
×13+8×
17
21

=

17
21
×(13+8),

=

17
21
×21,

=17.

填空题
单项选择题