Răspuns :
Răspuns:
a. 10/5-1+18/9
90/45-45/45+90/45
a=135/45
c. (6/6+12/6+18/6)-8/8
36/6-8/8
144/24-24/24
c=120
Răspuns:a)22/90
b)6/72
Explicație pas cu pas:
a) [(13/5-3/5)-(4/6+7/6-5/6)+18/9=
=10/5-6/6-18/9=
=22/90
b) (1+4/2+9/3)-8/8=
=(1/1+4/2+9/3)-8/8=
=(1/6+4/6+9/6)-8/8=
= 14/6-8/8=
=6/72