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= 2 i 4/10 * 5/4 - 2/3=
= 24/10 * 5/4 - 2/3= (skracam ułamki)
= 6/2 * 1/1 - 2/3=
= 6/2 - 2/3=
= 3 - 2/3=
= 2 i 3/3 - 2/3=
= 2 i 1/3
4,56 - 1,16 * ( 14 * 5/7 - 9,99)=
= 4 ,56 - 1,16 *(2 * 5/1 - 9,99)=
= 4,56 - 1,16 * (10/1 - 9,99)=
= 4,56 - 1,16 *(10 - 9,99)=
= 4,56 - 1,16 * 0,01=
= 4,56 - 0,0116 =
= 4,5484
0,2 * (5 i 1/5 - 3,7) - 0,06 =
= 0,2 * ( 5 i 2/10 - 3,7) - 0,06 =
= 0,2 * ( 5,2 - 3,7) - 0,06 =
= 0,2 * 1,5 - 0,06=
= 0,3 - 0,06 =
= 0,24