Вычисли.
7 сут. 19 ч- 4 сут. 10 ч=?ч
5ч 25 мин - 2 ч 50 мин =?мин
3 мин 20 c ÷ 5=?с
Зв, 15 лет + 4 в. 80 лет =?лет
130 с×3=?мин ?с
360 лет + 450 лет =?в ?г
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