Răspuns:
a) =[(-3·2+1)/2+(1·5+1)/5]+[(-1·2+1)/2+(2·10+9)/10]=
(-⁵⁾7/2+²⁾6/5)+(-⁵⁾3/2+29/10)=
(-35+12)/10+(-15+29)/10=
-23/10+8/10=
-15/10=-3/2= -1 intreg1/2
b) = (-29/6+3/2)+(7/12-5/4)=
(-58+18)/12+(7-15)/12=
-40/12-8/12=
-48/12= -4
c) =(-7/18 +19/9)- (-7/2+ 4 )=
(-7+38)/18-(-7+8)/2=
31/18-1/2=(31-9)18=
= 22/18=11/9 = 1intreg si 2/9
d) =(-23/4 -17/6)+ (-5/16+ 25/12)=
(-69-34)/12+(-15+100)/48=
-103/12+85/48=
(-412+85)/48=
- 327/48 = -6 intrgi si 39/48
e) =(-43//21 )+(-9/7 + 2/3 )=
-43/21-27/21+14/21=
-56/21= -8/3= - 2intregi si 2/3
f) =(7/6 +29/9 )+(-5/3 + 42/18)=
(21+58-30+42)/18=
91/18=5 intregi si 1/18
g) = -95/45 )+(17/5 - 19/15 )+( -7/45 )=
(-95+323-7) /45=
221/45= 4 intregi si 41/45
h) = (-22/3+11/9)+(-8/3+5/9)=
(-66+11)/9+(-24+5)/9=
-55/9-19/9=
-74/9=8 intregi si 2/9
