问题 解答题
根据比例的基本性质.在横线里填上合适的数.
(1)______:4.5=0.4:9
(2)
0.3
4
=
()
32

(3)
7
9
:______=
1
2
3
5

(4)
()
12
=
3
18

(5)
1
12
:______=4:8
(6)______:0.5=
1
4
1
16
答案

(1)4.5×0.4÷9=0.2;

(2)0.3×32÷4=2.4;

(3)

7
9
×
3
5
÷
1
2

=

7
15
÷
1
2

=

14
15

(4)12×3÷18=2;

(5)

1
12
×8÷4

=

2
3
÷4

=

1
6

(6)0.5×

1
4
÷
1
16

=

1
8
÷
1
16

=2.

故答案为:0.2;2.4;

14
15
;2;
1
6
;2.

单项选择题
单项选择题