1) 4/9 - 2/3 a) -4/7 b) -2/9 c) 5/9 d) 2/9 2) 77/11 x 88/8 a) 77/1 b) -77/1 c) 7/3 d) 2/7 3) 35/7 x 35/49 a) -175/49 b) 73/49 c) 175/49 d) 67/49 4) 5/12 + 7/9 - 2/3 a) 19/36 b) 17/47 c) -19/36 d) 17/36 5) 15/5 + 45/5 a) 7/1 b) -7/1 c) -9/1 d) 9/1 6) 7/4 + 8/9 a) -96/36 b) 95/36 c) -94/ 36 d) - 93/36 7) 7/8 +15/12 a) 31/24 b) -31/24 c) -47/24 d) 47/24 8) 5/12 + 4/82 - 3/4 a) 3/12 b) 2/12 c) 5/12 d) 10/12 9) 6/1 - 14/1 a) 8/1 b) 9/1 c) -8/1 d) -9/1 10) 36/6 x 3/9 a) -2/1 b) 2 c) -/2 d) 2/1

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