7+77+777+7777+77777
=7*(1+11+111+1111+11111)
=7*(11111+1111+111+11+1)
=7*12345
=86415
(1+11+111+1111+11111)*7=12345*7=86415
7+77+777+7777+77777
=7×(1+11+111+1111+11111)
=7×12345
=86415
(1+11+111+1111+11111+11111)*7=86415
7+77+777+7777+77777
=7×(1+11+111+1111+11111)
=7×12345
=86415
7+77+777+7777+77777
=7*(1+11+111+1111+11111)
=7*12345
=86415
7+77+777+7777+77777
=10-3+100-23+1000-223+10000-2223+100000-22223
=111110-(20+220+2220+22220+3*5)
=111110-(24680+3*5)
=111110-24695
=86415
比较新颖吗??
这就叫变缺为整,由整扣缺.
7+77+777+7777+77777
=7*(1+11+111+1111+11111)
=7*(11111+1111+111+11+1)
=7*12345
=86415
7+77+777+7777+77777
=7*(1+11+111+1111+11111)
=7*12345
=86415
7+77+777+7777+77777=7*5+70*4+700*3+7000*2+70000=86415
7+77+777+7777+77777
=7×(1+11+111+1111+11111)
=7×12345
=86415
777777777777777=7×(111111111111111)=7×12345=86415简单!!!!!!!!!
777777777777777=7×(111111111111111)=7×12345=86415
7*(111111111111111)=86415
7+77+777+7777+77777
=7*(1+11+111+1111+11111)
=7*(11111+1111+111+11+1)
=7*12345
=86415