Question

65×165+34×165+105 怎样简便运算？

Answer 1

=165×（65+34+1-1）+105
=165×（100-1）+105
=165×100-165+105
=16500-50=16450

Answer 2

165×（65+34）+105
＝165×99+105
＝165×100-165+105
＝16500-50
＝16450

Answer 3

65×165+34×165+165
=(65+34+1)×165
=100×165
=16500

Answer 4

65*165+34*165+165
=165*（65+34+1）
=165*100
=16500

Answer 5

65×165+34×165+105
=65×165+34×165+165-60
=（65+34+1）×165-60
=100×165-60
=16500-60
=16440