| 7×4-5X=0.8 | X:
| 2:5=0.3X:7. |
28-5x+5x=0.8+5x,
28-0.8=0.8+5x-0.8,
27.2=5x,
27.2÷5=5x÷5,
x=5.44;
(2)X:
| 27 |
| 20 |
| 4 |
| 9 |
9x=
| 27 |
| 20 |
9x=
| 27 |
| 5 |
9x÷9=
| 27 |
| 5 |
x=
| 3 |
| 5 |
(3)2:5=0.3X:7,
1.5x=14,
1.5x÷1.5=14÷1.5,
x=9
| 1 |
| 3 |
编辑:chaxungu时间:2026-04-27 13:38:30分类:小学数学题库
| 7×4-5X=0.8 | X:
| 2:5=0.3X:7. |
| 27 |
| 20 |
| 4 |
| 9 |
| 27 |
| 20 |
| 27 |
| 5 |
| 27 |
| 5 |
| 3 |
| 5 |
| 1 |
| 3 |