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(9+4)/(9-4)=13/5=2,6
b)
(1,2+0,3-0,5)/(0,4+0,6)=1/1=1
W dzialaniach na ulamkach dziesietnych wlaczamy kalkulator.
c)
(√(16/9)-0,4-0,5)/(4/10+5/3)=(4/3-9/10)/(2/5+5/3)=
(40-27)/30 : (6+25)/15=13/30*15/31=13/2*1/31=13/62