Odpowiedź:
zad. 9
a) 1/4- 1/16= 4/16- 1/16= 3/16
b) 3/4-9/32= 24/32- 9/32= 15/32
c) 49/55 -4/5= 49/55- 44/55= 5/55= 1/11
d) 67/72-3/8= 67/72- 27/72=40/72
zad.10.
3/8-1/3= 9/24- 8/24= 1/24
b) 5/9-1/10= 50/90- 9/90= 41/90
c) 6/7-4/5= 30/35- 28/35= 2/35
d) 8/9 - 4/7= 56/63- 36/63= 20/63
zad.11.
a) 1/8-1/12= 3/24- 2/24= 1/24
b) 4/21- 1/18= 24/126- 7/126= 17/126
c) 15/36 - 7/30= 75/180 - 42/180= 33/180= 11/60
d) 9/42 - 5/56= 36/168 - 15/168= 21/168 = 1/ 8
Szczegółowe wyjaśnienie:
