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)
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![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)](/uploads/image/z/5228886-30-6.jpg?t=%E6%9C%89%E4%B8%A4%E9%81%93%E7%AE%97%E6%9C%AF%E9%A2%98%E8%A6%81%E7%AE%80%E7%AE%97%281%29+20042005%2A20052004-20042004%2A20052005%282%29+%281%2B0.12%2B0.23%29%2A%280.12%2B0.23%2B0.34%29-%281%2B0.12%2B0.23%2B0.34%29%2A+%280.12%2B0.73%29)
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)
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)
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)
1、20042005*20052004-20042004*20052005
=(20042004+1)*(20042004+10000)-20042004*(20042004+10001)
=20042004^2+10001*20042004+10000-20042004^2-20042004*10001
=10000
2、(1+0.12+0.23)*(0.12+0.23+0.34)-(1+0.12+0.23+0.34)* (0.12+0.73)
=(1+0.12+0.23)*(0.12+0.23+0.34)-(0.12+0.23+0.34)* (0.12+0.73)-(0.12+0.73)
=(1+0.12+0.23-0.12-0.73)*(0.12+0.23+0.34)-(0.12+0.73)
=0.5*0.69-0.85
=-0.505
1.(20042004+1)*20052004-(20052004+1)*20042004
=20042004*20052004+20052004-20042004*20052004-20042004
=10000
10000
2.368