0,6 × 1 1/9 - 7/9 : ( 2 - 1/4 ) =
Transformi fractia zecimala in fractie ordinara:
0,6 = 3/5
3/5 × 1 1/9 - 7/9 : ( 2 - 1/4 ) =
= 3/5 × 10/9 - 7/9 : ( 2 - 1/4 ) =
Calculezi ce se afla in paranteza:
= 3/5 × 10/9 - 7/9 : 7/4 =
= 3/5 × 10/9 - 7/9 × 4/7 =
Se simplifica fractiile cu 5 si cu 3
=2/3 - 7/9 × 4/7 =
Se simplifica fractiile cu 7
= 2/3 - 1/9 × 4 =
= 2/3 - 4/9 = 2/9
c) ( 2/3 + 5,13 : 9 ) : 3 71/100 - 0,(3)
0,(3) = 3/9
Impartim numerele din prima paranteza
= ( 2/3 + 0,57 ) : 3 71/100 - 3/9 =
Transformi fractia mixta intr-o fractie supraunitara
= ( 2/3 + 0,57 ) : 371/100 - 3/9 =
= (2/3 + 57/100) : 371/100 - 3/9 =
= ( 2/3 + 57/100) × 100/371 - 3/9 =
Aduni fractiile din paranteza
= 371/300 × 100/371 - 3/9 =
Se simplifica 371 cu 371 si 100 cu 300
= 1/3 - 3/9 =
Se simplifica 3/9
= 1/3 - 1/3 = 0
