计算，能简算的要简算①4.8×123+415÷35②(317+534)÷451③(12-25)÷(45×18)④4-724÷4848-79⑤59×10-59×34-59×0.25⑥12×23×34×45×…×20112012．-数学
①4.8×1
| 2 |
| 3 |
| 1 |
| 5 |
| 3 |
| 5 |
=4.8×
| 5 |
| 3 |
| 5 |
| 3 |
=（4.8+4.2）×
| 5 |
| 3 |
=9×
| 5 |
| 3 |
=15；
②(
| 3 |
| 17 |
| 5 |
| 34 |
| 4 |
| 51 |
=
| 11 |
| 34 |
| 4 |
| 51 |
=
| 33 |
| 8 |
③(
| 1 |
| 2 |
| 2 |
| 5 |
| 4 |
| 5 |
| 1 |
| 8 |
=
| 1 |
| 10 |
| 1 |
| 10 |
=1；
④4-
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| 24 |
| 48 |
| 48 |
| 7 |
| 9 |
=4-
| 7 |
| 24 |
| 7 |
| 9 |
=4-（
