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a)1/5+1/2-1/3=(6+15-10)/30=11/30
b)2/3+(1/4).3=2/3+3/4=(8+9)/12=17/12
c)[(3/4)/(1/2)]-2/3=6/4-2/3=(18-8)/12=10/12=5/6
d)3/5+[(1/5)/(1/10)]=3/5+10/5=13/5
b)2/3+(1/4).3=2/3+3/4=(8+9)/12=17/12
c)[(3/4)/(1/2)]-2/3=6/4-2/3=(18-8)/12=10/12=5/6
d)3/5+[(1/5)/(1/10)]=3/5+10/5=13/5
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