Răspuns :
7.
a)=11-2/12
=9/12 (se simplifica prin 3)
=3/4
b)=5-4/36
=1/36
c)=19-16/20
=3/20
d)=10-3/14
=7/14 (se simplifica prin 7)
=1/2
8.
a)=1/1-4/7 (1/1 se inmulteste cu 7)
=7/7-4/7
=7-4/7
b)=8-7/8
=1/8
c)=9-2/9
=7/9
d)=4-3/4
=1/4
("/"=supra)
7.
a)=11-2/12
=9/12 (se simplifica prin 3)
=3/4
b)=5-4/36
=1/36
c)=19-16/20
=3/20
d)=10-3/14
=7/14 (se simplifica prin 7)
=1/2
8.
a)=1/1-4/7 (1/1 se inmulteste cu 7)
=7/7-4/7
=7-4/7
b)=8-7/8
=1/8
c)=9-2/9
=7/9
d)=4-3/4
=1/4
("/"=supra)