3/5-1/4+3/5=? 4/15+9/20-3/10=? 18/20-(1/4+2/5)=?
5/8+7/12-4/9=? 17/18-(1/12+1/6)=? 1/2+1/4-1/8=?
(14/15-2/5)-1/3=? 4/11+2/5+7/11+1/5=? 4/5-3/10+2/3=?
3/7-(9/14-1/2)=? 8/9-5/9+1/6=? 8/15+2/5+1/2=?
2/3-4/7+5/6=? 17/20-3/20-9/20=? 12-6/13-7/13=?
8/15-(1/3+1/6)=? 2-2/4+3/5=? 3/5-1/4+3/5=? 4/15+9/20-3/10=? 18/20-(1/4+2/5)=?
5/8+7/12-4/9=? 17/18-(1/12+1/6)=? 1/2+1/4-1/8=?
(14/15-2/5)-1/3=? 4/11+2/5+7/11+1/5=? 4/5-3/10+2/3=?
3/7-(9/14-1/2)=? 8/9-5/9+1/6=? 8/15+2/5+1/2=?
2/3-4/7+5/6=? 17/20-3/20-9/20=? 12-6/13-7/13=?
8/15-(1/3+1/6)=? 2-2/4+3/5=?