[(123×2+2.5)÷78-215]÷1.6[(514-4.25)×58]÷38+33÷116[(915-3.2)÷212]×[1÷(2.1-29100)]9.75+99.75+999.75+9999.75123-[(3.62×215+6.38÷712)×1.82-113×0.82]2890-数学
| 4 |
| 3 |
=1
| 2 |
| 3 |
| 4 |
| 3 |
=1
| 2 |
| 3 |
| 4 |
| 3 |
=
| 1 |
| 3 |
⑥
2890+
| ||||||
|
=（2890+
| 100 |
| 120 |
| 105 |
| 120 |
| 84 |
| 120 |
| 100 |
| 120 |
| 105 |
| 120 |
| 84 |
| 120 |
=（2890+
| 289 |
| 120 |
| 120 |
| 289 |
=2890×
| 120 |
| 289 |
| 289 |
| 120 |
