题目内容
| 解比例. (1)
| (2)0.4:x=80%:60 | ||||||||
| (3)15:3=12:x | (4)
| ||||||||
(5)
| (6)
|
(1)
=
,
10x=6×7,
10x÷10=42÷10,
x=4.2,
(2)0.4:x=80%:60,
80%x=60×0.4,
80%x÷80%=24÷80%,
x=30,
(3)15:3=12:x,
15x=12×3,
15x÷15=36÷15,
x=2.4,
(4)
:
=x:
,
x=
×
,
x×
=
×
×
,
x=
,
(5)
=
,
2x=22.4×3,
2x÷2=67.2÷2,
x=33.6,
(6))
=
:2.8.
2.8x=12×
,
2.8x÷2.8=21÷2.8,
x=7.5.
| 6 |
| x |
| 10 |
| 7 |
10x=6×7,
10x÷10=42÷10,
x=4.2,
(2)0.4:x=80%:60,
80%x=60×0.4,
80%x÷80%=24÷80%,
x=30,
(3)15:3=12:x,
15x=12×3,
15x÷15=36÷15,
x=2.4,
(4)
| 3 |
| 4 |
| 9 |
| 10 |
| 3 |
| 5 |
| 9 |
| 10 |
| 3 |
| 4 |
| 3 |
| 5 |
| 9 |
| 10 |
| 10 |
| 9 |
| 3 |
| 4 |
| 3 |
| 5 |
| 10 |
| 9 |
x=
| 1 |
| 2 |
(5)
| 22.4 |
| x |
| 2 |
| 3 |
2x=22.4×3,
2x÷2=67.2÷2,
x=33.6,
(6))
| x |
| 12 |
| 7 |
| 4 |
2.8x=12×
| 7 |
| 4 |
2.8x÷2.8=21÷2.8,
x=7.5.
练习册系列答案
相关题目