Выполните действия:
2/7 + 1/3 - 1/4;
5/8 - (1/4+1/3)

1пример 1)2/7+1/3=42)4-1/4=2/62пример(1/4+1/3)=2/75/8-2/7=3/1

2/7+1/3-1/46/21+7/21-1/413/21-1/452/84-21/84=31/845/8-(1/4+1/3)5/8-(3/12+4/12)5/8-7/1215/24-14/24=1/24