Oblicz :
A) ( 2 2/3+4 2/3):3 2/3=
B) 1/4:2 3/4+5:2 1/2=
C) 5*(2/7:5/14)-2 1/3=
D) 2 2/5: ( 4-3 3/5)=
E) 5 1/4:(1/2 do potengi 2 )-2 2/7:1 3/5=
F) 6 2/9*(5 -4 1/2:9)
Pomocy ;((
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A) ( 2 2/3+4 2/3):3 2/3=7 1/3 : 11/3 = 22/3 * 3/11=2
B) 1/4:2 3/4+5:2 1/2=1/4*4/11+5*1/5=11+1=12
C) 5*(2/7:5/14)-2 1/3=5(2/7*14/5)-2 1/3=5*4/5 -2 1/3=20/5-2 1/3=4-2 1/3=1 2/3
D) 2 2/5: ( 4-3 3/5)=12/5:2/512/5*5/2=6
E) 5 1/4:(1/2 do potengi 2 )-2 2/7:1 3/5=21/4*4/1-16/7*5/8=21-10/7=21-1 3/7=19 4/7
F) 6 2/9*(5 -4 1/2:9)=56/9*(5-9/2*1/9)=56/9*(5-1/2)=56/9*3 1/2=56/9*7/2=196/9=21 7/9