题目内容
解比例
(1)
=
(2)
:
=x:
(3)
=
(4)
=
.
(1)
| 12.5 |
| 2.5 |
| x |
| 8 |
(2)
| 3 |
| 4 |
| 9 |
| 10 |
| 3 |
| 5 |
(3)
| 22.4 |
| x |
| 2 |
| 3 |
(4)
| 6 |
| x |
| 10 |
| 7 |
(1)
=
,
2.5x=12.5×8,
2.5x÷2.5=100÷2.5,
x=40;
(2)
:
=x:
,
x=
×
,
x÷
=
÷
,
x=
;
(3)
=
,
2x=22.4×3,
2x÷2=67.2÷2,
x=33.6;
(4)
=
,
10x=6×7,
10x÷10=42÷10,
x=4.2.
| 12.5 |
| 2.5 |
| x |
| 8 |
2.5x=12.5×8,
2.5x÷2.5=100÷2.5,
x=40;
(2)
| 3 |
| 4 |
| 9 |
| 10 |
| 3 |
| 5 |
| 9 |
| 10 |
| 3 |
| 4 |
| 3 |
| 5 |
| 9 |
| 10 |
| 9 |
| 10 |
| 9 |
| 20 |
| 9 |
| 10 |
x=
| 1 |
| 2 |
(3)
| 22.4 |
| x |
| 2 |
| 3 |
2x=22.4×3,
2x÷2=67.2÷2,
x=33.6;
(4)
| 6 |
| x |
| 10 |
| 7 |
10x=6×7,
10x÷10=42÷10,
x=4.2.
练习册系列答案
相关题目