Question

calculati:
a) (5 pe 7 + 55 pe 77+ 555 pe 777):5 pe 7
b) e in poza de mai sus
c)0,1(2):0,(12)
d)0,12:0,3+0,5×1,2
va rog ajutatima,coroana!!!!!!!

Answer 1

a) (5/7 + 55/77+ 555/777):5/7 =
= (5/7 + 5/7+ 5/7):5/7 =
=15/7 × 7/5 =3

b) (1 1/3 + 2 1/6) :(2-1/3)=
=(4/3+13/6) : 5/3=
=(8+13)/ 6 × 3/5=
=21/6 × 3/5=
=21/10 

c)0,1(2):0,(12)
=(12-1)/90 : 12/99=.
=11/90× 99/12 =
=11/10× 11/12 =
=121/120=1,008(3)

d)0,12:0,3+0,5×1,2=
=12/100 :3/10 +5/10 × 12/10=
=12/100 ×/10/3 +60/100 =
=4/10 +6/10=
=10/10= 
=1