12.5×0.4×2.5×80.87×3.16+4.649×101用简便方法怎么做

分类: 作业答案 • 2022-01-09 18:03:15

问题描述：

答

12.5×0.4×2.5×80.87×3.16+4.649×101
=12.5×(0.4×2.5)×80.87×3.16+4.649×(100+1)
=12.5×1×80.87×3.16+464.9+4.649
=3660.914