题目内容
解方程.
①x+
x=42
②1.3:x=0.26:0.32.
①x+
| 2 |
| 5 |
②1.3:x=0.26:0.32.
(1)x+
x=42,
x=42,
x×
=42×
,
x=30,
(2)1.3:x=0.26:0.32.
0.26x=1.3×0.32,
0.26x÷0.26=0.416÷0.26,
x=1.6.
| 2 |
| 5 |
| 7 |
| 5 |
| 7 |
| 5 |
| 5 |
| 7 |
| 5 |
| 7 |
x=30,
(2)1.3:x=0.26:0.32.
0.26x=1.3×0.32,
0.26x÷0.26=0.416÷0.26,
x=1.6.
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