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1. \(\)Hoeveel seconden passen er in 60 minuten? \(\)
2. \(\)Hoeveel minuten passen er in 900 seconden?\(\)
3. \(\)Hoeveel seconden passen er in 57 minuten? \(\)
4. \(\)Hoeveel minuten passen er in 3480 seconden?\(\)
5. \(\)Hoeveel uren passen er in 284400 seconden?\(\)
6. \(\)Hoeveel seconden passen er in 68 uren? \(\)
7. \(\)Hoeveel minuten passen er in 4080 seconden?\(\)
8. \(\)Hoeveel seconden passen er in 32 uren? \(\)
9. \(\)Hoeveel minuten passen er in 54 uren? \(\)
10. \(\)Hoeveel minuten passen er in 4320 seconden?\(\)
11. \(\)Hoeveel minuten passen er in 1140 seconden?\(\)
12. \(\)Hoeveel seconden passen er in 44 uren? \(\)

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Verbetersleutel

1. \(60 \text{ minuten}\\=60\times60\text{ seconden}\\=3600\text{ seconden}\)
2. \(900 \text{ seconden}\\=900:60\text{ minuten}\\=15\text{ minuten}\)
3. \(57 \text{ minuten}\\=57\times60\text{ seconden}\\=3420\text{ seconden}\)
4. \(3480 \text{ seconden}\\=3480:60\text{ minuten}\\=58\text{ minuten}\)
5. \(284400 \text{ seconden}\\=284400:3600\text{ uren}\\=79\text{ uren}\)
6. \(68 \text{ uren}\\=68\times3600\text{ seconden}\\=244800\text{ seconden}\)
7. \(4080 \text{ seconden}\\=4080:60\text{ minuten}\\=68\text{ minuten}\)
8. \(32 \text{ uren}\\=32\times3600\text{ seconden}\\=115200\text{ seconden}\)
9. \(54 \text{ uren}\\=54\times60\text{ minuten}\\=3240\text{ minuten}\)
10. \(4320 \text{ seconden}\\=4320:60\text{ minuten}\\=72\text{ minuten}\)
11. \(1140 \text{ seconden}\\=1140:60\text{ minuten}\\=19\text{ minuten}\)
12. \(44 \text{ uren}\\=44\times3600\text{ seconden}\\=158400\text{ seconden}\)