Răspuns :
75/80
Explicație pas cu pas:
1/5+1/3+3/4=5/4
20-5/4=20•4-5/4=80/80-5/80=75/80
75/80
Explicație pas cu pas:
1/5+1/3+3/4=5/4
20-5/4=20•4-5/4=80/80-5/80=75/80
75/80
Explicație pas cu pas:
1/5+1/3+3/4=5/4
20-5/4=20•4-5/4=80/80-5/80=75/80
75/80
Explicație pas cu pas:
1/5+1/3+3/4=5/4
20-5/4=20•4-5/4=80/80-5/80=75/80