1. (2023四下·黄石港期末) 直接写得数。                                                                                                                   

5.8﹣4＝	3.8＋0.12＝
3.1×0.03＝	0.25＋0.75＝
1.9×30＝	1.25×8＝
0.8×5×6＝	52＝