49+499+4999+49999+499999

49+499+4999+49999+499999求解答
2024-11-20 12:23:55
推荐回答(1个)
回答1:

统一加1,变成(49+1)+(499+1)+(4999+1)+(49999+1)+(499999+1)-5=50+500+5000+50000+500000-5=555550-5=555545