Давайте выполним данные арифметические операции:
13/60 - 7/40 = (134)/(604) - (73)/(403) = 52/240 - 21/120 = (52-21)/240 = 31/240
7/11 - 7/12 = (712)/(1112) - (711)/(1211) = 84/132 - 77/132 = (84-77)/132 = 7/132
7/15 - 2/5 = (71)/(151) - (23)/(53) = 7/15 - 6/15 = (7-6)/15 = 1/15
11/21 - 3/14 = (112)/(212) - (33)/(143) = 22/42 - 9/42 = (22-9)/42 = 13/42
6/7 - 2/3 = (63)/(73) - (27)/(37) = 18/21 - 14/21 = (18-14)/21 = 4/21
3/12 - 3/8 = (32)/(122) - (33)/(83) = 6/24 - 9/24 = (6-9)/24 = -3/24 = -1/8
Итак, решения вычитания данных дробей будут:
1) 31/2402) 7/1323) 1/154) 13/425) 4/216) -1/8
Давайте выполним данные арифметические операции:
13/60 - 7/40 = (134)/(604) - (73)/(403) = 52/240 - 21/120 = (52-21)/240 = 31/240
7/11 - 7/12 = (712)/(1112) - (711)/(1211) = 84/132 - 77/132 = (84-77)/132 = 7/132
7/15 - 2/5 = (71)/(151) - (23)/(53) = 7/15 - 6/15 = (7-6)/15 = 1/15
11/21 - 3/14 = (112)/(212) - (33)/(143) = 22/42 - 9/42 = (22-9)/42 = 13/42
6/7 - 2/3 = (63)/(73) - (27)/(37) = 18/21 - 14/21 = (18-14)/21 = 4/21
3/12 - 3/8 = (32)/(122) - (33)/(83) = 6/24 - 9/24 = (6-9)/24 = -3/24 = -1/8
Итак, решения вычитания данных дробей будут:
1) 31/240
2) 7/132
3) 1/15
4) 13/42
5) 4/21
6) -1/8