1.345乘2005加0.28乘200.5加6.3乘20.05加92乘2.002加510乘0.2005加2421乘2.005用简便运算

问题描述:

1.345乘2005加0.28乘200.5加6.3乘20.05加92乘2.002加510乘0.2005加2421乘2.005用简便运算

1.345*2005+0.28*200.5+6.3*20.05+92*2.005+510*0.2005+2421*2.005
=2005(1.345+0.028+0.063+0.092+0.051+2.421)
=2005*4
=8020