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b) 4 2/3+7 4/5=14/3+39/5=70/15+117/15=187/15=12 7/15
c) 4 1/3-2 2/3=13/3-8/3=1 2/3
d) 6 3/5-8 4/5=33/5-44/5=-11/5=-2 1/5
e) -3 2/7+7 6/7= -23/7+55/7=32/7=4 4/7
f) -9 4/9-5 7/9=-85/9-52/9=-137/9=-15 2/9
g) 1 1/2+1/3=3/2+1/3=9/6+2/6=11/6=1 5/6
h) 2 2/3+1/2=8/3+1/2=16/6+3/6=19/6=3 1/6
i) 3 1/2-1/4=7/2-1/4=14/4-1/4=13/4=3 1/4
j) 1 1/4-1/2=5/4-1/2=5/4-2/4=3/4
k) 2 3/4-3 1/2=11/4-7/2=11/4-14/4=-3 2/4=-3 1/2
l) 5 1/4-4 2/3=21/4-14/3=63/12-56/12=7/12