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b) 23 2/3 - 5 7/9 = 71/3 - 52/9 = 213/9 - 52/9 = 161/9 = 17 8/9
c) 2 5/12 + 3/8 = 2 10/24 + 9/24 = 2 19/24
d) 5 7/18 + 2 5/6 = 5 7/18 + 2 15/18 = 7 22/18 = 8 4/18 = 8 2/9
e) 4/7 - 1/3 = 12/21 - 7/21 = 5/21
f) 6 5/12 - 4 5/6 = 6 5/12 - 4 10/12 = 5 17/12 - 4 10/12 = 1 7/12
g) 4 2/7 - 2 = 30/7 - 14/7 = 16/7 = 2 2/7
h) 3 1/3 - 2/5 = 3 5/15 - 6/15 = 2 20/15 - 6/15 = 2 14/15