Question

(6,75-4,5x1 intreg si 2\3)x(-1intreg si1\3)la cub

Answer 1

(675/100-45/10*5/3)*(-4/3)la cub
=(675/100-15/2)*(-64/27)  efectuam operatia de inmultire si simplificam in paranteza, ridicam la cub a doua paranteza
=(675/100-750/100)*(-64/72) aducem la acelasi numitor comun in prima paranteza
=(-75/100)*(-64/27) efectuam operatia de adunare in prima paranteza 
=16/9     am simplificat cele doua fractii