oblicz a)dwie całe 3/5+jedna cała 5/6= b)cztery całe 3/7-trzy całe 1/6= c)siedem całych 4/9-piec całych 5/8= d)7/13*9/14= e)4/5;16/35= f)dwie całe 1/5*siedem całych 1/2= (4/5+2/5)*(3/4-1/3)=

a) 13/5 +11/6=78/30+55/30= 133/30 = 4 i 13/30 b) 31/7 +19/6= 186/42+133/42= 319/42=7 i 25/42 c)67/9 + 45/8= 536/72+405/72 = 941/72= 13 i 5/72 d)=63/182 e) 4/5 *35/16 = 140/80=1 i 60/80 f) 11/5 *15/2= 165/10 = 16 i 5/1o 6/5* (9/12 -4/12)=6/5 * 5/12= 30/60= 1/2

a.2 3/5+1 5/6=2 18/30+1 25/30=4 13/30 b.4 3/7-3 1/6= 4 18/42-3 7/42=1 11/42 c.7 4/9-5 5/8=7 32/72-5 45/72=1 59/72 d.7/13*9/14=9/26 e.4/5:16/35=1 3/4 f.2 1/5*7 1/2=16 1/2 (4/5+2/5)*(3/4-1/3)=1/1