15391":60=256'31"=4grade16'31''
secundele le imparti la 60 si afli minutele
minutele le imparti la 60 si afli gradele
237"=3'57''
32135''=535'35''=8grade55'35''
mod de calcul
transformam secundele in minute:32135:60=535,58(3) deci 535 minute
transformam minutele in secunde:32135-(535x60)=32135-32100=35 secunde
transformam minutele in grade:535:60=8,91(6)deci 8 grade
535-(8x60)=535-480=55minute
50480''=841'20''=14 grade1'20''
2576'=42 grade56'