Какая цифра стоит в седьмом разряде после запятой в числе 34,5(0123)?
Выберите неверные утверждения
1 рациональные числа и иррациональные числа называются действительными
2 число, которое можно записать в виде бесконечной непериодической дроби, называют рациональным числом
3 любую обыкновенную дробь можно преобразовать в десятичную дробь
4 число, которое можно записать в виде бесконечной периодической дроби, называют иррациональным числом
Установите соответствие периода каждой дроби.
4/99 4
4/9 18
2/11 04
1/9 1

Если, например у него осталось 100 страниц - то есть это 50%, то 100% будет 200страниц. Это одна пятая. Если мы умножим это на 5, получим 1000страниц. Это 20% всей книги. Если мы умножим это на 5, получим 5000страниц. Это вся книга. А потом мы складываем всё то, что он прочитал ранее, и отнимаем от книги:5000-(1000+200+100)=3700(стр)
Это образец, страницы можно уменьшить в 10 раз и будет всё норм.
1)10*2=20(стр)-100%от  одной пятой
2)20*5=100(стр.)-20%всей книги
3)100*5=500(стр.)-вся книга.
4)500-(100+20+10)=370(стр) ему осталось прочитать.

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