Răspuns:
1a) =6/7
b) (3·3+1)/3-(2·3+2)/3=10/3-8/3=2/3
2a) ²⁾11/5+7/10+⁵⁾3/2=22/10+7/10+15/10=(44/10)⁽²=22/5
b) ²⁾13/10-7/20-(⁴⁾1/5+⁵⁾1/4)=26/20-7/20-(4/20+5/20)=36/20-7/20-9/20=20/20=1
3) 9/5·(³⁾1/12-²⁾1/18)=9/5·(3/36-2/36)=9/5·1/36=1/20
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