Question

Oblicz;
(ułamki np 3/4 to ułamek ok)
5 1/5 + 2 4/5=
18 1/5 - 1 1/4 - 2 1/5=
4 1/2 + 6 3/4 - (12 - 5 3/8)=
3 3/4 x 4/5 - 4/5=
2 1/2 - (1 3/4 - 6 1/2 x 1/6)=
3 2/3 -2/3 : 2 1/6 + 4/13=
1 1/2 : 3/8 + 7=
POMOCY na jutro

Answer 1

5 1/5 + 2 4/5 = 8

18 1/5 - 1 1/4 - 1 1/5 = 18 4/20 - 1 5/20 -1 4/20 = 16 19/20 - 1 4/20 = 15 15/20

4 1/2 + 6 3/4 - (12 - 5 3/8) = 4 1/2 + 6 3/4 - 7 5/8 = 4 4/8 + 6 6/8 - 7 5/8 = 11 - 7 5/8 = 3 3/8

3 3/4 x 4/5 - 4/5 = 15/4 x 4/5 - 4/5 = 3/1 x 1 - 4/5 = 3 - 4/5 = 2 1/5

2 1/2 - (1 3/4 - 6 1/2 x 1/6) = 2 1/2 - (1 3/4 - 6 3/6 x 1/6) =  2 1/2 - (1 3/4 - 39/6 x 1/6) = 2 1/2 - (1 3/4 - 13/6 x 1/2) = 2 1/2 - (1 3/4 - 13/12) = 2 1/2 - (1 9/12 - 1 1/12) = 2 1/2 - 8/12 = 2 6/12 - 8/12 = 1 10/12

3 2/3 - 2/3 : 2 1/6 + 4/13 = 3 2/3 - 2/3 x 6/13 + 4/13 = 3 2/3 - 2/1 x 2/13 + 4/13 = 3 2/3 - 4/13 + 4/13 = 3 13/39 - 12/39 + 12/39 = 3 1/39 + 12/39 = 3 13/39

1 1/2 : 3/8 + 7 = 3/2 x 8/3 + 7 = 1 x 4/1 +7 = 4 + 7 = 11