17160
解析:
440×18+56×165
=440×18+28×(165×2)
=440×18+28×330
=440×18+7×4×110×3
=440×18+440×21
=440×(18+21)
=440×39
=440×(40-1)
=440×40-440
=17600-440
=17160
简便计算
440x18十56×165
=44x180+56x165
=44x(165+15)+56x165
=44x165+44x15+56x165
=(44+56)x165+15x4x11
=100x165+60x11
=16500+660
=17160
440x(20-2)+(60-4)x165
=8800-880+9900-660
=18700-1540=17160
=7920+9240
=17160