Выполните деяния: 1)20 1/420 4/92)2 3/5:1 11/153)8 1/115 1/24)6 11/25:7 2/335

1) 20 1/4 * 20 4/9 = 81/4 * 184/9 = (81 * 184)/(4 * 9) = 14904/36 = 414.
    20 1/4 = (20 * 4 + 1)/4 = 81/4.
    20 4/9 = (20 * 9 + 4)/9 = 184/9.
2) 2 3/5 / 1 11/15 = 13/5 / 26/15 = (13 * 15)/(5 * 26) = 195/130 на 65 = 3/2 = 1 1/2.
    2 3/5 = (2 * 5 + 3)/5 = 13/5.
    1 11/15 = (1 * 15 + 11)/15 = 26/15.
3) 8 1/11 * 5 1/2 = 89/11 * 11/2 = (89 * 11)/(11 * 2) = 979/22 на 11 = 89/2 = 44 1/2.
    8 1/11 = (8 * 11 + 1)/11 =89/11.
    5 1/2 = (5 * 2 + 1)/2 = 11/2.
4) 6 11/25 / 7 2/3 = (161 * 3)/(25 * 23) = 483/575 на 23 = 21/25.
    6 11/25 = (6 * 25 + 11)/25 = 161/25.
    7 2/3 = (7 * 3 + 2)/3 = 23/3.