题目内容
解方程或解比例.
| 4X-7×1.3=9.9 |
| 1.5:X=0.3:40 |
|
(1)4X-7×1.3=9.9,
4X-9.1=9.9,
4X-9.1+9.1=9.9+9.1,
4X÷4=19÷4,
X=4.75;
(2)
X+
X=42,
X=42,
X×
=42×
,
X=36;
(3)1.5:X=0.3:40,
0.3X=1.5×40,
0.3X÷0.3=60÷0.3,
X=200.
(4)
=30%,
×3=0.3×3,
X=0.9.
4X-9.1=9.9,
4X-9.1+9.1=9.9+9.1,
4X÷4=19÷4,
X=4.75;
(2)
| 2 |
| 3 |
| 1 |
| 2 |
| 7 |
| 6 |
| 7 |
| 6 |
| 6 |
| 7 |
| 6 |
| 7 |
X=36;
(3)1.5:X=0.3:40,
0.3X=1.5×40,
0.3X÷0.3=60÷0.3,
X=200.
(4)
| X |
| 3 |
| X |
| 3 |
X=0.9.
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