245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+24=多少?
问题描述:
245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+24=多少?
有一列数“2,4,,5,,2,,4,5,,2,4,,5· · · · · · · · ·”照这样排下去,第60个数是多少?这60个的和是多少?
答
245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+245+24
=245×19+24
=4655+24
=4679