156×56的简便运算 ，怎么算？谢谢

Question

大神求答，谢谢

Answer 1

156×56的简便运算
=156x(60-4)
=156x60-156x4
=9360-624
=8736

Answer 2

156×56
=(100+50+6)×56
=100×56+50×56+6×56
=5600+2800+336
=8400+336
=8736

Answer 3

156x56
=156x60-156x4
=160x60-4x60-160x4+4x4
=9600-240-640+16
=9600-880+16
=9600-900+20+16
=8736本回答被网友采纳