题目内容
| 解方程 (1)
| (2)x×(
| ||||||||||||
(3)X:42=
| (4)
|
(1)
x+
×
=1,
x+
=1,
x+
-
=1-
,
x=
,
x×
=
×
,
x=
;
(2)x×(
-
)=
,
x=
,
x×12=
×12,
x=8;
(3)X:42=
:10,
10X=42×
,
10X÷10=30÷10,
X=3;
(4)
=
,
2x=1.2×5,
2x÷2=6÷2,
x=3.
| 3 |
| 4 |
| 1 |
| 2 |
| 3 |
| 4 |
| 3 |
| 4 |
| 3 |
| 8 |
| 3 |
| 4 |
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 8 |
| 3 |
| 4 |
| 5 |
| 8 |
| 3 |
| 4 |
| 4 |
| 3 |
| 5 |
| 8 |
| 4 |
| 3 |
x=
| 5 |
| 6 |
(2)x×(
| 3 |
| 4 |
| 2 |
| 3 |
| 2 |
| 3 |
| 1 |
| 12 |
| 2 |
| 3 |
| 1 |
| 12 |
| 2 |
| 3 |
x=8;
(3)X:42=
| 5 |
| 7 |
10X=42×
| 5 |
| 7 |
10X÷10=30÷10,
X=3;
(4)
| 1.2 |
| 2 |
| X |
| 5 |
2x=1.2×5,
2x÷2=6÷2,
x=3.
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