8888008x125怎么算?还有(9991x1999.1999+9991.9991x1999)/2.0002
问题描述:
8888008x125怎么算?还有(9991x1999.1999+9991.9991x1999)/2.0002
简算或计算,
答
8888008x125=8888008*1000/8=11110010000(9991x1999.1999+9991.9991x1999)/2.0002=(9991x1999*1.00001+1999*9991*1.00001)/2.0002=9991*1999*1.00001*2/2.00002=9991*1999=(10000-9)*1999=19990000-9*(2000-1)=1...