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= 2 i 5/10 * (625/1000 + 2,5 - 0,7)=
= 2,5 * (0,625 + 2,5 - 0,7) =
= 2,5 * ( 3,125 - 0,7) =
= 2,5 * 2,425=
= 6,0625
2,1:1 i 2/5 +2/3-1/2=
= 2 i 1/10 : 7/5 + 2/3 - 1/2=
= 21/10 * 5/7 + 2/3 - 1/2 = (skracam 21 z 7 oraz 10 z 5)
= 3/2 * 1/1 + 2/3 - 1/2=
= 3/2 + 2/3 - 1/2=
= 9/6 + 4/6 - 3/6=
= 13/6 - 3/6=
= 10/6=
= 1 i 4/6=
= 1 i 2/3