题目内容
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)
=
(3)
: =
:
(4)
=
(5)
: =4:8
(6) :0.5=
:
.
(1)
(2)
0.3 |
4 |
( ) |
32 |
(3)
7 |
9 |
1 |
2 |
3 |
5 |
(4)
( ) |
12 |
3 |
18 |
(5)
1 |
12 |
(6)
1 |
4 |
1 |
16 |
分析:依据比例的基本性质,即两内项之积等于两外项之积,即可进行解答.
解答:解:(1)4.5×0.4÷9=0.2;
(2)0.3×32÷4=2.4;
(3)
×
÷
=
÷
=
;
(4)12×3÷18=2;
(5)
×8÷4
=
÷4
=
;
(6)0.5×
÷
=
÷
=2.
故答案为:0.2;2.4;
;2;
;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 |
=
2 |
3 |
=
1 |
6 |
(6)0.5×
1 |
4 |
1 |
16 |
=
1 |
8 |
1 |
16 |
=2.
故答案为:0.2;2.4;
14 |
15 |
1 |
6 |
点评:此题主要考查比例的基本性质的灵活应用.
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