1) А) 5/7 больше 2/3 Б) 12 целых 3/4 меньше 15 целых 1/3
2) 7/30
3) Х-44 13/15=44 1/21 +50 2/35
x-44 13/15 = 44 5/105 + 50 6/105
x-44 13/15 = 94 11/105
x = 94 11/105 + 44 13/15
x = 94 11/105 + 44 91/105
x = 138 102/105
x = 138 34/35
4) а) 83 63/101 - 19 24/101 = 83•101+63/101 - 19•101+24/101 = 8446/101 - 1943/101 = 8446-1943/101 = 6503/101 = 64 39/101
б) 32 8/21 - 23 7/15 = 32•21+8/21 - 23•15+7/15 = 680/21 - 352/15 = 5•680/5•21 - 7•352/7•15 = 3400/105 - 2464/105 = 3400-2464/105 = 936/105 = 312•3/35•3 = 312/35 = 8 32/35
