Răspuns :
( 4:4+4:1)+50:10=
(1+4:1)+50:10=
(1+4)+50:10=
5+50:10=
5+5=
=10
(1+4:1)+50:10=
(1+4)+50:10=
5+50:10=
5+5=
=10
(4:4+4:1) +50 :10
= (1+4) +50 :10
=5 +50 :10 ....... ( a disparut paranteza)
= 5+ 5
= 10
= (1+4) +50 :10
=5 +50 :10 ....... ( a disparut paranteza)
= 5+ 5
= 10