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1. \(\)Hoeveel seconden passen er in 84 minuten? \(\)
2. \(\)Hoeveel seconden passen er in 90 minuten? \(\)
3. \(\)Hoeveel seconden passen er in 70 uren? \(\)
4. \(\)Hoeveel uren passen er in 338400 seconden?\(\)
5. \(\)Hoeveel seconden passen er in 35 minuten? \(\)
6. \(\)Hoeveel seconden passen er in 26 uren? \(\)
7. \(\)Hoeveel seconden passen er in 69 minuten? \(\)
8. \(\)Hoeveel uren passen er in 237600 seconden?\(\)
9. \(\)Hoeveel seconden passen er in 51 minuten? \(\)
10. \(\)Hoeveel minuten passen er in 1920 seconden?\(\)
11. \(\)Hoeveel minuten passen er in 5880 seconden?\(\)
12. \(\)Hoeveel minuten passen er in 4440 seconden?\(\)

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Verbetersleutel

1. \(84 \text{ minuten}\\=84\times60\text{ seconden}\\=5040\text{ seconden}\)
2. \(90 \text{ minuten}\\=90\times60\text{ seconden}\\=5400\text{ seconden}\)
3. \(70 \text{ uren}\\=70\times3600\text{ seconden}\\=252000\text{ seconden}\)
4. \(338400 \text{ seconden}\\=338400:3600\text{ uren}\\=94\text{ uren}\)
5. \(35 \text{ minuten}\\=35\times60\text{ seconden}\\=2100\text{ seconden}\)
6. \(26 \text{ uren}\\=26\times3600\text{ seconden}\\=93600\text{ seconden}\)
7. \(69 \text{ minuten}\\=69\times60\text{ seconden}\\=4140\text{ seconden}\)
8. \(237600 \text{ seconden}\\=237600:3600\text{ uren}\\=66\text{ uren}\)
9. \(51 \text{ minuten}\\=51\times60\text{ seconden}\\=3060\text{ seconden}\)
10. \(1920 \text{ seconden}\\=1920:60\text{ minuten}\\=32\text{ minuten}\)
11. \(5880 \text{ seconden}\\=5880:60\text{ minuten}\\=98\text{ minuten}\)
12. \(4440 \text{ seconden}\\=4440:60\text{ minuten}\\=74\text{ minuten}\)