Question

dau coroana va rog urgeent

Answer 1

Răspuns

a) 422/99 ; b) 79/10 ;

Explicație pas cu pas:

a) 3,(4)+0,(81) =(34-3)/9+81/99 = 31/9+81/99 = (341+81)/99 = 422/99 ;

b) (0,3+2/5)+(5-2 1/5) = 3/10+2/5+5+11/5 = (3+4+50+22)/10 = 79/10 ;

Answer 2

3,(4)=31/9
0,(81)=81/9
31/9+81/9=112/9

(0,3+2/5)=3/10+4/10=7/10
5-11/5=25/5-11/5=14/5
7/10+14/5=7/10+28/10=35/10=7/2