37×38 73×63-73用简便法怎么计算?

2024-11-18 22:43:36
推荐回答(1个)
回答(1):

37×38+73×63-73
=37X40-37X2+73X(63-1)
=1480+73X(62-1)-1
=1480+73X60+73X1-1
=1480+4380+72
=5860+72
=5932