5.61-
| 2 |
| 5 |
| 3 |
| 5 |
3.74×5.8+62.6×0.58
（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 7 |
| 1 |
| 10 |
| 1 |
| 14 |
| 1 |
| 15 |
| 1 |
| 28 |
| 1 |
| 30 |
| 2 |
| 5 |
| 3 |
| 5 |
=（5.61+4.39）-（
| 2 |
| 5 |
| 3 |
| 5 |
=10-2，
=8；
（2）3.74×5.8+62.6×0.58，
=3.74×5.8+6.26×5.8，
=（3.74+6.26）×5.8，
=10×5.8，
=58；
（3）（
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 5 |
| 1 |
| 7 |
| 1 |
| 10 |
| 1 |
| 14 |
| 1 |
| 15 |
| 1 |
| 28 |
| 1 |
| 30 |
=（
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 7 |
| 1 |
| 14 |
| 1 |
| 28 |
| 1 |
| 3 |
| 1 |
| 5 |
| 1 |
| 10 |
| 1 |
| 15 |
| 1 |
| 30 |
=
| 28 |
| 28 |
| 22 |
| 30 |
=1-
| 11 |
| 15 |
=
| 4 |
| 15 |