先想一想下面各题的运算顺序，再计算．931÷[（332+428）÷40]82+18×0-0÷1887×4÷87×415×[（517-321）÷98]．

Question

先想一想下面各题的运算顺序，再计算．
931÷[（332+428）÷40]
82+18×0-0÷18
87×4÷87×4                    
15×[（517-321）÷98]．先想一想下面各题的运算顺序，再计算．
931÷[（332+428）÷40]
82+18×0-0÷18
87×4÷87×4                    
15×[（517-321）÷98]．

Answer 1

（1）931÷[（332+428）÷40]
=931÷[760÷40]
=931÷19
=49

（2）82+18×0-0÷18
=82+0-0
=82

（3）87×4÷87×4
=348÷87×4
=4×4
=16

（4）15×[（517-321）÷98]
=15×[196÷98]
=15×2
=30