(1988+1986+1984+…+6+4+2)-(1+3+5+…+1983+1985+1987

(1988+1986+1984+…+6+4+2)-(1+3+5+…+1983+1985+1987)
2025-05-11 14:43:04
推荐回答(2个)
回答1:

(1988+1986+1984+…+6+4+2)-(1+3+5+…+1983+1985+1987),
=(1988-1987)+(1986-1985)+…(4-3)+(2-1),
=1+1+…1+1,
=1×(1988÷2),
=994.

回答2:

很多觉得还是女神