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e) 4 1/2x1 1/3-2 2/5x5/7=9/2x4/3-12/5x5/7=3x2-12x1/7=6-12/7=6-1 5/7=5 7/7-1 5/7=4 2/7
f)1 2/3-5/6+2 1/10:1 6/15=5/3-5/6+21/10:21/15=10/6-5/6+21/10x15/21=5/6+1/2x3=5/6+3/2=5/6+9/6=14/6=2 2/6=2 1/3
g)(5/8+1/2):1 1/2-1/3=(5/8+4/8):3/2-1/3=9/8x2/3-1/3=3/4-1/3=9/12-4/12=5/12