Question

URGENT
EXERCITIILE DIN POZA

Answer 1

(-14/21+5/28) :(1/14) -(-3 1/2) ×(-3/14+1/42)=
=(-14/21+5/28) ×14 -(-7/2) ×(-9+1)/42=
=-28/3+5/2 -7/2 ×(-8/42)=
=(-56+15)/6-1/2 ×8/6=
=-41/6-2/3=
=(-41-4)/6=
=-45/6=
=-15/2


[(7/36-11/72-5/24) :0,(6)+0,75]×0,5=
=[(7*2-11-5*3)/72 : 6/9+ 75/100]×5/10=
=[(14-11-15)/72 : 2/3+ 3/4]×1/2=
=[(-12/72) ×3/2+ 3/4]×1/2=
=[(-1/6) ×3/2+ 3/4]×1/2=
=(-1/4+ 3/4)×1/2=
=2/4×1/2=
=1/2×1/2=1/4