用简便方法计算．29-716×2925×4×4557-59×5787×386（15+23）×1512×115+13×1256×59+59×16．-数学
=
| 8 |
| 5 |
| 4 |
| 5 |
=
| 32 |
| 25 |
（3）
| 5 |
| 7 |
| 5 |
| 9 |
| 5 |
| 7 |
=（1-
| 5 |
| 9 |
| 5 |
| 7 |
=
| 4 |
| 9 |
| 5 |
| 7 |
=
| 20 |
| 63 |
（4）87×
| 3 |
| 86 |
=（86+1）×
| 3 |
| 86 |
=86×
| 3 |
| 86 |
| 3 |
| 86 |
=3+
| 3 |
| 86 |
=3
| 3 |
| 86 |
（5）（
| 1 |
| 5 |
| 2 |
| 3 |
=
| 1 |
| 5 |
| 2 |
| 3 |
=3+10，
=13；
（6）
| 1 |
| 2 |
| 1 |
| 15 |
| 1 |
| 3 |
| 1 |
| 2 |
=（
| 1 |
| 15 |
| 1 |
| 3 |
| 1 |
| 2 |
=
| 2 |
| 5 |
| 1 |
| 2 |
=
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