va rog frumos rapid si corect.

Răspuns:
a)3×2+1=7pe2=7:2=3,5
3,5+4,6+5,9=14cm
b)2×9+7=25pe9=25:9=2,7(7)
2,7(7)+2,7(7)+2,7(7)+2,7(7)=75,6cm
c)2×(25,6+34,3)=119,8cm
d)5×9+1=46pe9=46:9=5,1(1)
5,1(1)×4=20,4cm
Sper ca te-am ajutat;)