Question

Oblicz :
1/2 - 5/8 =
- 1/3 - 2/5 =
3/4 - -1/2 =
-2/3 + -4/5 =
2/3 x -3/4 =
1 i 1/3 x - 1 i 1/4 =
- 4/7 podzielić przez - 4/5 =

Answer 1

1/2 - 5/8 = 4/8-5/8= -1/8
- 1/3 - 2/5 =  -5/15-6/15= -11/15
3/4 - -1/2 = 3/4+2/4=5/4=1i1/4
-2/3 + -4/5 = -10/15-12/15= -22/15= -1i7/15
2/3 x -3/4 = 8/12 x - 9/12 = -72/144 = -1/2
1 i 1/3 x - 1 i 1/4 = 16/12 x - 15/12= -60/36= -5/3 = -1i 2/3

Answer 2

1/2-5/8 = 4/8 - 5/8 = -1/8

-1/3 - 2/5 = -5/15 - 6/15

3/4 - -1/2 = 3/4 - -2/4 = 1/4
-2/3 + -4/5 = -6/15 + -12/15=-18/15=-1 3/15
2/3 x -3/4 = 8/12 x -9/12 = -72/12 = -6 
1 i 1/3 x - 1 i 1/4 = 16/12 x -15/12 = -240/12
- 4/7 podzielić przez - 4/5 = -20/35 : -28/35 = 8/35

 

p.s licze na naj :)