有两道算术题要简算(1) 20042005*20052004-20042004*20052005(2) (1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)* (0.12+0.73)

问题描述:

有两道算术题要简算
(1) 20042005*20052004-20042004*20052005
(2) (1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)* (0.12+0.73)

10000
2.368

1.(20042004+1)*20052004-(20052004+1)*20042004
=20042004*20052004+20052004-20042004*20052004-20042004
=10000

1、20042005*20052004-20042004*20052005 =(20042004+1)*(20042004+10000)-20042004*(20042004+10001)=20042004^2+10001*20042004+10000-20042004^2-20042004*10001=100002、(1+0.12+0.23)*(0.12+0.23+0.34)-(1+...