第1个回答 2016-06-11
85又1/3×3/8+75又5/6×6/7+56又1/4×4/5=80又16/3×3/8+70又35/6×6/7+50又25/4×4/5=80×3/8+16/3×3/8+70×6/7+35/6×6/7+50×4/5+25/4×4/5=30+2+60+5+40+5=1423又4/17+6又13/17×0.25+6又13/17×0.625+6又13/17×0.125-166又1/20÷41=3又4/17+6又13/17×(0.25+0.625+0.125)-164又41/20÷41=3又4/17+6又13/17×1-164÷41-41/20÷41=10-4-1/20=5又19/2013/16×(9/13×17-9/13)-(12又4/5-3又5/13-2又8/13)=13/16×9/13×(17-1)-[12又4/5-(3又5/13+2又8/13)]=9-[12又4/5-6]=9-6又4/5=2又1/5