计算
(1)0.625×4+3÷0.4 | (2)4×3.09×0.25 | (3)(27.5×0.75-3.405)÷0.8 |
(4)4.02÷[(1-0.4)÷0.1] | (5)(50-20×0.1)÷0.01 | (6)18.75-0.43-4.57. |
用简便算法计算,请写出简算过程
×+× | ×16× | (+)×16. |
(1)0.625×4+3÷0.4 | (2)4×3.09×0.25 | (3)(27.5×0.75-3.405)÷0.8 |
(4)4.02÷[(1-0.4)÷0.1] | (5)(50-20×0.1)÷0.01 | (6)18.75-0.43-4.57. |
×+× | ×16× | (+)×16. |