1) (5/7 * 2 1/3 * 5/6 - 1) : (1 - 7/8 * 1 3/5 * 3/14)

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Ответ ассистента

1) $(5/7 \cdot 7/3 \cdot 5/6 - 1) : (1 - 7/8 \cdot 8/5 \cdot 3/14) = (25/18 - 1) : (1 - 3/10) = 7/18 : 7/10 = 5/9$ 2) $(127/15 - 15/4 + 22/5 - 487/60) : (17/4 - 11/4) = 60/60 : 3/2 = 1 \cdot 2/3 = 2/3$ 3) $(21/13 \cdot 13/42 + 40/7 \cdot 21/8) : (65/8 + 28/8) = (1/2 + 15) : 93/8 = 31/2 \cdot 8/93 = 4/3 = 1 1/3$ 4) $13/5 : 91/15 + 15/14 - 112/73 \cdot (40/7 - 81/16) = 3/7 + 15/14 - 112/73 \cdot 73/112 = 3/7 + 15/14 - 1 = 21/14 - 1 = 1/2$ 5) $243/5 : 27/4 \cdot 5/12 - 17/6 + 169/94 \cdot (1/2 - 1/2) = 3 - 17/6 + 0 = 1/6$ 6) $(149/12 + 20/12 - 46/12 + 33/12) : (5/2 \cdot 2/5 - 7/9) = 13 : 2/9 = 117/2 = 58 1/2$ 7) $27/2 : 10/3 + 33/2 \cdot 16/11 + 77/4 : 4/25 = 81/20 + 24 + 1925/16 = 4.05 + 24 + 120.3125 = 148.3625 = 148 29/80$ 8) $5/2 \cdot 48 - 11/3 : 1/18 + 62/12 : 7/36 = 120 - 66 + 186/7 = 54 + 26 4/7 = 80 4/7$

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