直接写计算结果12.5×17×0.56=957-349+249-837=257-(35-27)=7800×8÷36×108÷26=16+112+120+130=119+2190+31900=-数学
| 4 |
| 9 |
=1
| 2 |
| 7 |
=
| 2 |
| 7 |
（3）2
| 5 |
| 7 |
| 3 |
| 5 |
| 2 |
| 7 |
=2
| 5 |
| 7 |
| 3 |
| 5 |
| 2 |
| 7 |
=27+
| 2 |
| 7 |
| 3 |
| 5 |
=3-
| 3 |
| 5 |
=2
| 2 |
| 5 |
（4）7800×8÷36×108÷26，
=7800×8×
| 1 |
| 36 |
| 1 |
| 26 |
=7200；
（5）
| 1 |
| 6 |
| 1 |
| 12 |
| 1 |
| 20 |
| 1 |
| 30 |
=
| 1 |
| 2 |
| 1 |
| 3 |
| 1 |
| 3 |
| 1 |
| 4 |
| 1 |
| 4 |
