题目内容
解比例:
:x=
:8
:
=
:x
=
.
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 20 |
| 7 |
| 9 |
| 1.4 |
| 0.5 |
| 2.1 |
| x |
(1)
:x=
:8
x=
×8
x=6
x÷
=6÷
x=12;
(2)
:
=
:x
x=
×
x÷
=
÷
x=
;
(3)
=
1.4x=0.5×2.1
1.4x÷1.4=1.05÷1.4
x=0.75.
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 2 |
| 3 |
| 4 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
| 1 |
| 2 |
x=12;
(2)
| 1 |
| 3 |
| 1 |
| 20 |
| 7 |
| 9 |
| 1 |
| 3 |
| 1 |
| 20 |
| 7 |
| 9 |
| 1 |
| 3 |
| 1 |
| 3 |
| 7 |
| 180 |
| 1 |
| 3 |
x=
| 7 |
| 60 |
(3)
| 1.4 |
| 0.5 |
| 2.1 |
| x |
1.4x=0.5×2.1
1.4x÷1.4=1.05÷1.4
x=0.75.
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