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b) 1 2/5+3 4/10+2 1/2=7/5+34/10+5/2=14/10+34/10+25/10=73/10=7 3/10
f) 10-(2 1/9-1/2+1 5/6)=10-(19/18-1/2+11/6)=10-(19/18-9/18+33/18)=10-(10/18+33/18)=10-44/18=180/18-44/18=136/18=7 10/18
h) 3 1/4+2 2/5-(4 1/3-2 2/3)=13/4+12/5-(13/3-8/3)=195/60+144/60-(260/60-160/60)=339/60-100/60=239/60=3 59/60