Question

Oblicz:
6 3/4-7/8 =
6 7/9-2/3=
1 1/2-6/7=
7 3/4-5 4/5=
PILNE NA DZISIAJ POMOCY

Answer 1

6 3/4-7/8 =6 6/8-7/8=5 7/8
6 7/9-2/3=6 7/9-6/9=6 1/9
1 1/2-6/7=1 7/14-12/14=9/14
7 3/4-5 4/5=7 15/20-5 16/20=1 19/20