Предмет: Математика, автор: abduhalikovmah

сколько чисел, сумма цифр которых равна 3, имеется в пределах 1000?

Ответы

Автор ответа: IOSTNATASHA

Составим всевозможные суммы трех чисел, результат сложения которых равен 3:

1+1+1=3

1+2+0=3

3+0+0=3.

Теперь с помощьюэтих цифр составим трехзначные числа.
Из единиц можно составить одно число: 111.
Из цифр 1, 2 и 0 можно составить 4 чисел: 120, 102, 201, 210.
Из цифр 3 и 0 можно составить одно число: 300.
Всего получилось 6 чисел – 111, 102, 120, 201, 210, 300.

Ответ: 6 чисел.

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