Răspuns:
a) 4×6+5 = 29/6 + 19/6 = 48/6
3×6+1 = 19/6
b) 2×2+1= 5/2 3×2+1 =7/2
deci 5/2 +(7/2+3/2) = 5/2+10/2=15/2
c) 1×3+1=4/3 aducem la acelasi numitori si facem numitorii comuni :
deci 2/1 amploficam prin 3 și ne da 8/3
8/3+4/3=12/3
d) 3×7+1/7 = 22/7 , 2×7+1/7=15/7 ,2×7+3/7 =17/7
22/7+( 15/7+17/7) = 22/7+32/7= 54/7
e) 4×7+2/7=30/7 , 2×7+5=19/7
30/7+19/7=49/7
f) 2×4+1=9/4 , 1×4+3/4=7/4
aducem la acelasi numitori deci :
5/1 amplificam cu 4 =20/4
20/4+9/4+7/4= 36/4
g) 2×5+3/5=13/5 , 4×5+1 /5 =21/5
3×5+4/5 =19/5
13/5+(21/5+19/5) = 13/5+40/5=53/5
h) 2×8+5/8 = 21/8
aducem la acelasi numitori 5/1 =40/8
40/8 +(21/8+7/8+3/8) = 40/8 +31/8= 71/8
Sper ca te am ajutat :))
