Răspuns:
Explicație pas cu pas:
a) 2/9·(-3/4+27/8)=2/9·(-6+27)/8=2/9·21/8=2·21/9·8=7/12
c) -3/10·(-5/9)+(-1/6)=(3·5)/(10·9)-1/6=1/6-1/6=0
e) (-5/6+1/12)·1 1/3=(-10+1)/12·4/3=-9/12·4/3=-3/4·4/3=-1
g)-3/8-(-14/25)·(+75/28)= -3/8+(14·75)/(25·28)= -3/8+(14·3)/28=
=-3/8+3/2 =(-3+12)/8=9/8
