题目内容
求求知数x
(1)4.5×0.4-
x=
(2)2.4:x=3.5:10.5.
(1)4.5×0.4-
| 3 |
| 4 |
| 3 |
| 5 |
(2)2.4:x=3.5:10.5.
(1)4.5×0.4-
x=
,
1.8-
x=
,
1.8-
x+
x=
+
x,
1.8-
=
+
x-
,
1.2=
x,
1.2÷
=
x÷
,
x=1.6;
(2)2.4:x=3.5:10.5,
3.5x=2.4×10.5,
3.5x÷3.5=25.2÷3.5,
x=7.2.
| 3 |
| 4 |
| 3 |
| 5 |
1.8-
| 3 |
| 4 |
| 3 |
| 5 |
1.8-
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 5 |
| 3 |
| 4 |
1.8-
| 3 |
| 5 |
| 3 |
| 5 |
| 3 |
| 4 |
| 3 |
| 5 |
1.2=
| 3 |
| 4 |
1.2÷
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 4 |
x=1.6;
(2)2.4:x=3.5:10.5,
3.5x=2.4×10.5,
3.5x÷3.5=25.2÷3.5,
x=7.2.
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