直接写得数。                                                                                                                                      

84÷21＝	300﹣50÷5＝	9×0＝	45÷（3×5）＝
0÷35＝	200÷5÷4＝	3.6×10＝	35﹣5×6＝
58×0+987＝	760﹣10×50＝	358+42＝	12+25×4＝