Question

Va rog frumos ! Exercitiul 4 din fotografie . Multumesc !

Answer 1

poti folosi acociativitatea

2/3+7/2+4/3+5/2

2/3+4/3+7/2+5/2 = 
6/3 + 12/2=
2+6=8

(1+1/3)+(2+5/3)
1+1/3+2+5/3=
1+2+1/3+5/3=
3+6/3=
3+2=5

1/9+5/6+2/15+8/9+1/6+13/15 = 
1/9+8/9+5/6+1/6+2/15+13/15=
9/9+6/6+15/15=
1+1+1=3

Answer 2

4.
a) 2/3+7/2+4/3+5/2=6/3 + 12/2 =2+6=8

b) (1+1/3)+(2+5/3)
il amplificam cu 3 pe 1 si pe 2
(3/3+1/3)+(6/3+5/3)=4/3+11/3=15/3=5

c)1/9+5/6+2/15+8/9+1/6+13/15=9/9+6/6+15/15=1+1+1=3