Question

Completeaza spatiile libere:
a) 3 h 45 min 15 s =....h=....min=....s;
b0 2 h 15 min 20 s=....h=.....min=.....s

2. Calculati in minute: 2h + 210 min + 3supra 4 h.

3. Transformati in ore, minute si secunde:
a) 8151 de secunde;
b) 15300 de secunde.

Answer 1

1 h = 60 min=3600 sec
1 min=60 sec
Completeaza spatiile libere:
a) 3 h 45 min 15 s =3+45/60+15/3600 =3 +0,75+0,0041(6) =3,7541(6) h=3*60+45+15/60=180+45+0,25=225,25 min =3*3600+45*60+15==10800+2700+15=13515 s
b) 2 h 15 min 20 s=2+15/60+20/3600=2+0.25+0,00(5)=2,25(5) h =2*60+15+20/60=120+15+0,(3)=135,(3) min = =2*3600+15*60+20=7200+900+20=8120 s

2. Calculati in minute: 2h + 210 min + 3supra 4 h=2*60+210+0,75*60=
=120+210+45=375 min

3. Transformati in ore, minute si secunde:
a) 8151 de secunde=2 ore15 min 51 sec
b) 15300 de secunde =4 ore  15 min 0 sec