Предмет: Математика, автор: alenasmir97

Сколько всего существует трехзначных чисел сумма цифр в записи которых равна 2 неизвестно 3 неизвестно 4 неизвестно Составь и запиши эти числа

Ответы

Автор ответа: РостиславУманец

0

Сумма цифр 2:

101

110

200

Всего 3 числа

Сумма цифр 3:

111

102

120

201

210

Всего 5 чисел

Сумма цифр 4:

103

112

121

130

211

202

220

301

310

400

Всего 10 чисел

Итого 18 чисел

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