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4 i 2/3- 1/3 : 2 =
= 4 i 2/3 - 1/3 * 2/1=
= 4 i 2/3 - 2/3=
= 4
3 i 3/4 : 5/6 - 1/4 *1 i 2/3=
= 15/4 * 6/5 - 1/4 * 5/3 =
= 3/2 * 3/1 - 5/12=
= 9/2 - 5/12=
= 54/12 - 5/12=
= 49/12=
= 4 i 1/12
1 i 2/5 * 3 i 4/7 - 2 i 1/8 * 2 i 6/17=
= 7/5 * 25/7 - 17/8 * 30/17=
= 1/1 * 5/1 - 1/4 * 15/1 =
= 5/1 - 15/4 =
= 5 - 3 i 3/4 =
= 4 i 4/4 - 3 i 3/4 =
= 1 i 1/4
zad 2.
1/2 * Z=27
Z = 27 : 1/2
Z = 27 * 2/1
Z = 54
spr.
1/2 * Z = 27
1/2 * 54 = 27
1/1 * 27 = 27
27 = 27
L=P
2/3 * S - 6=24
2/3 * S = 24 + 6
2/3 * S = 30
S = 30 : 2/3
S = 30 * 3/2
S = 15 * 3/1
S = 45/1
S = 45
spr.
2/3 * S - 6 = 24
2/3 * 45 - 6= 24
2/1 * 15 - 6= 24
30/1 - 6 = 24
30 - 6= 24
24 = 24
L=P