题目内容
7:2=28:x
=
:3=x:
:x=
:
.
| 1.2 |
| 2 |
| X |
| 5 |
| 4 |
| 15 |
| 6 |
| 5 |
| 1 |
| 3 |
| 4 |
| 45 |
| 3 |
| 20 |
7:2=28:x
7x=2×28
7x=56
x=8;
=
2x=1.2×5
2x=6
x=3;
:3=x:
3x=
×
3x=
x=
;
:x=
:
x=
×
x=
x=
.
7x=2×28
7x=56
x=8;
| 1.2 |
| 2 |
| X |
| 5 |
2x=1.2×5
2x=6
x=3;
| 4 |
| 15 |
| 6 |
| 5 |
3x=
| 4 |
| 15 |
| 6 |
| 5 |
3x=
| 8 |
| 25 |
x=
| 8 |
| 75 |
| 1 |
| 3 |
| 4 |
| 45 |
| 3 |
| 20 |
| 4 |
| 45 |
| 1 |
| 3 |
| 3 |
| 20 |
| 4 |
| 45 |
| 1 |
| 20 |
x=
| 9 |
| 16 |
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