数学题求简便运算详解,做好的给100分1>19.2*135-144/1000*1920+209*123/125 1/1*3+1/3*5+1/5*7+.+1/97*991/8128+1/254+1/508+1/1016+1/2032+1/4046+1/8128`44/45*37-8/453/4*17+0.25*2912/13/(53.9*2/3)2.6/[(7/12-5/16)*1.6]
问题描述：
数学题求简便运算详解,做好的给100分
1>19.2*135-144/1000*1920+209*123/125
1/1*3+1/3*5+1/5*7+.+1/97*99
1/8128+1/254+1/508+1/1016+1/2032+1/4046+1/8128`
44/45*37-8/45
3/4*17+0.25*29
12/13/(53.9*2/3)
2.6/[(7/12-5/16)*1.6]
答
19.2*135-144/1000*1920+209*123/125 =19.2*135-14.4*19.2+209*(1-2/125)=19.2*(135-14.4)+209-418/125=(20-0.8)*120.6+209-418*8/1000=2412-96.48+209-3.344=2621-99.824=2521.1761/1*3+1/3*5+1/5*7+.+1/97*99=[(1-...