(49-0.25)/0.25+(46-0.25)/0.25+(43-0.25)/0.25+.+(1-0.25)/0.25等于多少?

问题描述:

(49-0.25)/0.25+(46-0.25)/0.25+(43-0.25)/0.25+.+(1-0.25)/0.25等于多少?

(49-0.25)/0.25+(46-0.25)/0.25+(43-0.25)/0.25+.+(1-0.25)/0.25 =49/0.25-1+46/0.25-1+……+1/0.25-1 =(49+46+……+1)/0.25-17 =(25X9)/0.5-17 =450-17 =433