简单运算1986-1983+1980-1977+.12-9+6-3

问题描述:

简单运算1986-1983+1980-1977+.12-9+6-3

1986-1983+1980-1977+.+12-9+6-3
=(1986-1983)+(1980-1977)+……+(12-9)+(6-3)
=3+3+……+3+3
=3×331(共331个3)
=993