Oblicz:
a) 2/3 * ( 2 5/6 + 1,75)=
b) ( 4 7/8 - 2,5) * 1 1/3=
d) 1 4/5 : ( 8 13/25 - 1,5)=
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b) (4 7/8-2,5)*1 1/3=(39/8-25/10)*4/3=(195/40-100/40)*4/3=95/40*4/3=19/6=3 1/6
d) 1 4/5:(8 13/25-1,5)=9/5:(213/25-15/10)=9/5:(426/50-75/50)=9/5:351/50=9/5*50/351=10/39