数学简便运算：347x69+653x31+306x19怎么简便运算

347*69+653*31+306*19
=347*31+347*38+653*31+153*2*19
=31*(347+653)+38*(347+153)
=31*1000+38*500
=500*(62+38)
=500*100
=50000本回答被提问者采纳

347x69+653x31+306x19
=347*（31+38）+653x31+306x19
=347*31+347*38+653x31+306x19
=31*（347+653）+347*2*19+306*19
=31000+19*（347*2+306）
=31000+19000
=50000

347x(19+50)+653x31+306x19
=347x19+306x19+653x31+347x50
=(347+306)x19+653x31+347x50
=653x19+653x31+347x50
=653x50+347x50
=1000x50
=50000

347x69+653x31+306x19
=347x70-347+653x30+653+306x20-306
=347x70+653x30+306x20+653-306-347
=347x70+653x30+306x20+653-653
=306x70+653x30+306x20+41x70
=306x90+612x30+41x70+41x30
=306x90+306x60+41x100
=306*150+4100
=153*300+4100
=45900+4100
=50000