Помогите пожалуйста !!!
ВЫЧИСЛИТЕ:
1. (29-6 5/8)-(4-5/7)
2. (46 2/9-25)-(11 4/7-2/3)
3. (6 9/14-1/8)-(1-5/7)
4. (11 1/2-4/15)-(7-19/30)

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Пожалуйста

А почему там

1. (29 - 6 5/8) - (4 - 5/7) = 19 5/561) 29 - 6 5/8 = 28 8/8 - 6 5/8 = 22 3/82) 4 - 5/7 = 3 7/7 - 5/7 = 3 2/73) 22 3/8 - 3 2/7 = 22 21/56 - 3 16/56 = 19 5/562. (46 2/9 - 25) - (11 4/7 - 2/3) = 10 20/631) 46 2/9 - 25 = 21 2/92) 11 4/7 - 2/3 = 11 12/21 - 14/21 = 10 33/21 - 14/21 = 10 19/213) 21 2/9 - 10 19/21 = 21 14/63 - 10 57/63 = 20 77/63 - 10 57/63 = 10 20/633. (6 9/14 - 1/8) - (1 - 5/7) = 6 13/561) 6 9/14 - 1/8 = 6 36/56 - 7/56 = 6 29/562) 1 - 5/7 = 2/73) 6 29/56 - 2/7 = 6 29/56 - 16/56 = 6 13/564. (11 1/2 - 4/15) - (7 - 19/30) = 4 13/151) 11 1/2 - 4/15 = 11 15/30 - 8/30 = 11 7/302) 7 - 19/30 = 6 11/303) 11 7/30 - 6 11/30 = 10 37/30 - 6 11/30 = 4 26/30 = 4 13/15