Question

1.小明骑自行车从家去学校,去时逆风每分行100米,回来时顺风每分行180米,来回共行35分,小明家离学校多少米?最后答

Answer 1

1.设去要x分钟,则来要（35-x）分钟100x=180(35-x)280x=6300x=22.522.5*100=22502. =41.2*8+4.12+11*9+11*0.25+53.7*2-5.37=329.6+4.12+99+2.75+107.4-5.37=（329.6+99+107.4）+（4.12+2.75-5.37）=（330+100+106）+...