直接写得数。                                                                                                                                      

39÷3＝	240÷6＝	30×60＝	3.8－0.3＝
41－6＝	450÷5＝	14×50＝	59×31≈
59＋34＝	17×4＝	6＋0.6＝	401÷5≈