简便运算:9999999999*1111111111=?急,
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![简便运算:9999999999*1111111111=?急,](/uploads/image/z/2450676-12-6.jpg?t=%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%EF%BC%9A9999999999%2A1111111111%3D%3F%E6%80%A5%2C)
简便运算:9999999999*1111111111=?急,
简便运算:9999999999*1111111111=?急,
简便运算:9999999999*1111111111=?急,
9999999999*1111111111
=(10000000000-1)*1111111111
=11111111110000000000-1111111111
=1111111109999999999
1.1111111*10^19