Question

Quantas vezes usamos o algarismo 2 para escrever todos os números de:
a) 1 a 50?

b)1 a 100?

c)1 a 200?

d) 1 a 300?

Answer 1

Resposta:

a) 15 vezes

b)20 vezes

c)41 vezes

d)172 vezes

Explicação passo-a-passo:

a)1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,

16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 32, 42.

b)1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,

16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 32, 42, 52, 62, 72, 82, 92.