Răspuns:
(0.3 +2/5)+(5-2/1/5)=
(3/10+2/5)+(5-2/5)=
(3/10+4/10)+(5-2/5)=
7/10 + 5-2/5=
7/10 +5-4/10=
=3/10 +5
Explicație pas cu pas:
0.3=3/10
amplificam prima fractie de 2/5 cu 2
qmplificam a doua fractie de 2/5 cu 2
