Răspuns:
11. a)
D-S= diferența
a- 15/19= 4/19
a= 4/19+15/19
a= 19/19
Descazutul = 19/19
b)
41/11- a = 30/11
a= 41/11- 30/11
a= 11/11
Scazatorul=11/11
12)
a) 119/425+316/435= 435/435=1
b) 119/435+ 55/435= 174/435
c) 119/435 + 751/435= 870/435
