①0.8×
| 3 |
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②3
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| 7 |
| 3 |
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0.6-3x=0.2,
0.6-3x+3x=0.2+3x,
0.6=0.2+3x,
0.6-0.2=0.2+3x-0.2,
0.4=3x,
0.4÷3=3x÷3,
| 2 |
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x=
| 2 |
| 15 |
②3
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| 7 |
0.4x=3
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0.4x=
| 7 |
| 2 |
| 8 |
| 7 |
0.4x=4,
0.4x÷0.4=4÷0.4,
x=10;
编辑:chaxungu时间:2026-04-27 13:38:20分类:小学数学题库
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