1.【（0.075+37/40）／﹙2/5﹚-2/3-1.625】×8/25= ﹛2.5-2/3-1.625﹜×8/25=﹙11/6-13/8﹚×8/25=1/152.3.24-53/25+46/15 =81/25-53/25+46/15=314/75=4又14/753.1又4/17*（2又2/3-3/4）+17又11/12除以17/12=21/17×...还有 1又4/17*（2又2/3-31又4/17*（2又2/3-3/4）+17又11/12除以17/121又4/17×﹛2又2/3－31又4/17×（2又2/3－3/4）﹜+﹙17又11/12﹚／﹙17/12﹚=21/17×﹙8/3－531/17×＜8/3－3/4＞﹚﹢215/12×12/17=21/17×﹙8/3－531/17×23/12﹚+215/17=﹣67063/1156=﹣58又15/1156