Răspuns:
c)4-2,5/7 = introduci intregii in fractie
4-(2*7+5)/7=4-(14+5)/7=
28-19)/7=9/7
d)8-5,3/8=8-(8*5+3)/8=
8-43/8=(8*8-43)/8=(64-43)/8=21/8
e)10-4,7/9=
10-(4*9+7)/9=
10-(36+7)/9=
(90-43)9=47/9
Explicație pas cu pas:
