А.4 2/3 1 2/7 = (14/3) (9/7) = 126/21 = 6
Б.5/8 * 4/5 = 20/40 = 1/2
В.9/25 2 1/7 1 5/9 = (9/25) (15/7) (14/9) = 1890/6300 = 63/210 = 3/10
А.
4 2/3 1 2/7 = (14/3) (9/7) = 126/21 = 6
Б.
5/8 * 4/5 = 20/40 = 1/2
В.
9/25 2 1/7 1 5/9 = (9/25) (15/7) (14/9) = 1890/6300 = 63/210 = 3/10