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1. \(\)Hoeveel seconden passen er in 55 minuten? \(\)
2. \(\)Hoeveel minuten passen er in 5760 seconden?\(\)
3. \(\)Hoeveel seconden passen er in 25 minuten? \(\)
4. \(\)Hoeveel seconden passen er in 9 uren? \(\)
5. \(\)Hoeveel seconden passen er in 89 uren? \(\)
6. \(\)Hoeveel minuten passen er in 75 uren? \(\)
7. \(\)Hoeveel minuten passen er in 4620 seconden?\(\)
8. \(\)Hoeveel minuten passen er in 1320 seconden?\(\)
9. \(\)Hoeveel minuten passen er in 2280 seconden?\(\)
10. \(\)Hoeveel seconden passen er in 29 uren? \(\)
11. \(\)Hoeveel uren passen er in 82800 seconden?\(\)
12. \(\)Hoeveel uren passen er in 97200 seconden?\(\)

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Verbetersleutel

1. \(55 \text{ minuten}\\=55\times60\text{ seconden}\\=3300\text{ seconden}\)
2. \(5760 \text{ seconden}\\=5760:60\text{ minuten}\\=96\text{ minuten}\)
3. \(25 \text{ minuten}\\=25\times60\text{ seconden}\\=1500\text{ seconden}\)
4. \(9 \text{ uren}\\=9\times3600\text{ seconden}\\=32400\text{ seconden}\)
5. \(89 \text{ uren}\\=89\times3600\text{ seconden}\\=320400\text{ seconden}\)
6. \(75 \text{ uren}\\=75\times60\text{ minuten}\\=4500\text{ minuten}\)
7. \(4620 \text{ seconden}\\=4620:60\text{ minuten}\\=77\text{ minuten}\)
8. \(1320 \text{ seconden}\\=1320:60\text{ minuten}\\=22\text{ minuten}\)
9. \(2280 \text{ seconden}\\=2280:60\text{ minuten}\\=38\text{ minuten}\)
10. \(29 \text{ uren}\\=29\times3600\text{ seconden}\\=104400\text{ seconden}\)
11. \(82800 \text{ seconden}\\=82800:3600\text{ uren}\\=23\text{ uren}\)
12. \(97200 \text{ seconden}\\=97200:3600\text{ uren}\\=27\text{ uren}\)