题目内容
解方程.
×X=
X÷
=
7.2X-2X=41.6.
| 8 |
| 9 |
| 2 |
| 3 |
X÷
| 5 |
| 6 |
| 9 |
| 10 |
7.2X-2X=41.6.
(1)
×x=
,
×x×
=
×
,
x=
;
(2)x÷
=
,
x÷
×
=
×
,
x=0.75;
(3)7.2x-2x=41.6,
5.2x=41.6,
5.2x÷5.2=41.6÷5.2,
x=8.
| 8 |
| 9 |
| 2 |
| 3 |
| 8 |
| 9 |
| 9 |
| 8 |
| 2 |
| 3 |
| 9 |
| 8 |
x=
| 3 |
| 4 |
(2)x÷
| 5 |
| 6 |
| 9 |
| 10 |
x÷
| 5 |
| 6 |
| 5 |
| 6 |
| 9 |
| 10 |
| 5 |
| 6 |
x=0.75;
(3)7.2x-2x=41.6,
5.2x=41.6,
5.2x÷5.2=41.6÷5.2,
x=8.
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