Răspuns:
ex 1
a) 75/105= 5/7+2/7=7/7=1
b)1/3×3=1
c)-1/42+1 1/42=0
d)2/3÷2=1/3
ex 2
a=1/6
1/6 -1÷1/6= -35/6
ex 3
a) adevarat 0€N
b)adevarat 0€Z
c)adevarat 0€Z
ex 4
a) 1/2
b) 1/2
c) 77/170
d)39/25