①[（915-712）÷234]÷115②0.52×249+759×0.52③（125-45）×（2+23）÷135④[（4.25-318）×2.4+10÷614]÷0.13⑤24×（712+56）÷（6.375-538）⑥（1535÷3-223×178）÷138．-数学
=[
| 17 |
| 10 |
| 11 |
| 4 |
| 6 |
| 5 |
=
| 34 |
| 55 |
| 5 |
| 6 |
=
| 17 |
| 33 |
（2）0.52×2
| 4 |
| 9 |
| 5 |
| 9 |
=（2
| 4 |
| 9 |
| 5 |
| 9 |
=10×0.52；
=5.2；
（3）（1
| 2 |
| 5 |
| 4 |
| 5 |
| 2 |
| 3 |
| 3 |
| 5 |
=
| 3 |
| 5 |
| 8 |
| 3 |
| 5 |
| 8 |
=
| 3 |
| 5 |
| 5 |
| 3 |
=1；
（4）[（4.25-3
| 1 |
| 8 |
| 1 |
| 4 |
=[（4
| 1 |
| 4 |
| 1 |
| 8 |
