1右1/2+1右3/7+3右4/7 9/20÷3/5-1/25右5/9+8.2+4右4/9+1.83右3/4+3.25-2右1/23.24-2右3/25+3右1/157右1/5÷6/25-2右2/7×1右3/41÷0.1÷1/10-0.1×1/102000÷5/21-3右1/5×20005右1/2+0.7+14/152/3+7/12+3/10+9/20要有计算过程,拜托了.