Răspuns:
a)28/21 b)27/11
/=supra (=simplificat prin )=amplificat prin
Explicație pas cu pas:
a)3/7×2×9+4/9+2/3×3/7=28/11
3/7+22/9(3 +2/3×3/7=
22/21+2/3×3/7(3 =
22/21+2/7)3 =
22/21+6/21=28/21
b)2×3+2/3×1×11+4/11-1×11+4/11×1×5+1/5=27/11
8/3×15/11(3-15/11×6/5(5=
45/11-15/11×6/5(5=
45/11-18/11=27/11
