Предмет: Математика, автор: bayan080220

Сколько раз число 1 встречается от 1 до 100?
A)9
B)15
C)20
d)21
E)25

Ответы

Автор ответа: vasyache07
0

Ответ:

20 раз я так думаю

Пошаговое объяснение:

в каждом десятке: соответственно "1"-10 раз + во втором десятке все числа с цифры 1 начинаются  значит еще 9 единиц + 100. Итого: "1" -20 раз.

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