Привет)Задача легкая.
1)100-30=70% поля осталось вспахать после первого дня
2)70:100*75=52,5 % тракторная бригада вспахала за второй день
3)70-52.5=17,5% тракторная бригада вспахала за третий день
4)14*100:17,5=80( га)
Ответ-80 га площадь всего поля.
P.S-во втором и четвертом действии,расчеты выполняются по очереди(как и написано,тоисть во втором сразу 70:100 а потом то число умножить на 75.В четвертом 14 умножить на 100 и потом число которое выйдет разделить на 17,5)
Желаю удачи в школе)
Island
East west
Territory
Lake
Island continent
Mountain
Washed by oceans
Seas sea
To the north to the south
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(Но это не точно)
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