15 detik =....menit 1 3/4jam=.......menit 2 2/5menit=......detik 4 1/6 jam=......menit 5 1/4menit=.....detik 1 2/5jam=......menit

15 detik =... menit
15/60 detik
= 0,25 menit

3/4 jam = .... menit
3/4 x 60 menit
= 45 menit + 1 jam
= 45 menit + 60 menit
= 105 menit

2/5 menit = ... detik
2/5 x 60 detik
= 24 detik + 2 menit
= 24 detik + 120 detik
= 144 detik

1/6 jam = ... menit
1/6 x 60 menit
= 10 menit x 4 jam
= 10 menit x 240 menit
= 250 menit

1/4 menit = ... detik
1/4 x 60 detik
= 15 detik + 5 menit
= 15 detik + 300 detik
= 315 detik

2/5 jam = ... menit
2/5 x 60 menit
= 24 menit + 1 jam
= 24 menit + 60 menit
= 84 menit

1.0,25
2.45
3.24
4.15
5.24