99乘101乘10001

99乘101乘10001
99乘101乘10001

99乘101乘10001
99乘101乘10001
=(100-1)(100+1)10001
=(100^2-1)(100^2+1)
=100^4-1
=99999999

99乘101乘10001=99999999

99*101*10001 = 99999999

呵呵，有意思，99999999

(100-1)(100+1).得出结果成了(10000-1)(10000+1).非常简单

99乘101乘10001
=(100-1)(100+1)(10000+1)
=(10000-1)(10000+1)
=100000000-1
=99999999