a. 5/4+1/4=6/4=3/2
b. -7/2+11/2=4/2=2
c. 14/3-1/3=13/3=4 1/3 (4 intregi si 1/3)=4,(3)
d.2 2/3 - 4 1/3=8/3 - 13/3=-5/3=-1,(6)
e.2,8(3)-29/8= (283-28)/90 - 29/8 = (255·4)/(90·4)- 29·45/(8·45)=
=1020/360-1305/360=-285/360= -19/24= -0,791(6)
f. 1,2(7)-7/4= (127-12)/90 - 7/4= 115/90-7/4= 23/18-7/4=
=46/36-63/36= -17/36=0,47(2)
g. 2,0(5)- 11/8=(205-20)/90-11/8= 185/90 - 11/8=37/18 - 11/8=
=148/72-99/72= 49/72
h. 7/6 +(126-12)/90= 7/6 +114/90= 105/90+114/90=219/90= 73/30=2,4(3)
