1988-1985+1982-1979+······+8-5+2
= (1988-1985)+(1982-1979)+······+(8-5)+2
= 3+3+. + 3 + 2
= 3x661 + 2
= 1983+2
= 1985后來(lái)我想通了，你這有問(wèn)題，662還要/2，662是有幾個(gè)數(shù)字，我們要算的是有幾組（大數(shù)減小數(shù)），是331*3+2+995噢，你說(shuō)的對(duì)
我搞錯(cuò)了
最總共有331個(gè)3

1988= 2+6x331
1982 = 2+6x330
1976 = 2+6x329
... ...
22 = 2+6x3
14 = 2+6x2
8 = 2+6x1