求解!!!
A submarine,200m below sea level,descended a further 80m before ascending again by 100m.What is the present location of the submarine below sea level?
呢題點做????幫朋友問 , 我都唔係好識........
佢話應該係負數....我對負數認識最少.......
所以麻煩大家幫一幫手.....用少少時間諗一諗
係咪-220作者: ☆1.31 時間: 2012-7-27 19:52