Решите (1/2-1/3)+1/5,1/3-1/9+1/6,3/4-1/2+7/8,1/3-(1/9+1/6) решите уравнения x+1/3=5/12,4/15+x=5/12,x-2/9=7/18,x-2/15=8/45,5/8-x=5/12,(x-3/14)+2/7=5/6 сравните дроби 5/12 и 2/3,3/4 и 7/10,4/15 и 1/6,7/9 и 15/18,8/15 и 7/10,7/12 и 3/5,3/7 и 5/8,11/12 и 7/8,20/21 и 5/9 надо!