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b)6 3/5 - 8 4/5= - 2 1/5
c)-3 2/7 + 7 6/7=4 4/7
d)-9 4/9 - 5 7/9= - 15 2/9
e)1 1/2 + 1/3=3/2 + 1/3= 9/6 + 2/6= 11/6
f)2 2/3 + 1/2=7/3 + 1/2= 3 1/6
g)3 1/2 - 1/4=3 1/4
h)1 1/4 - 1/2=3/4
i)2 3/4 - 3 1/2=11/4 - 7/2=11/4 - 14/4= -3/4
j) 5 1/4 - 4 2/3=21/4 - 14/3 = 63/12 - 56/12=7/12