Qual é a diferença entre я знаю e я умею ?Podes indicar apenas respostas exemplo.

Я знаю = I know
Я умею = I can

After "Я умею" always goes an infinitive.

1. Я умею плавать. = I can swim. (Je sais nager)
2. Я умею писать. = I can write. (Je sais écrire)

After "Я знаю" goes "как" (in this meaning):

1. Я знаю, как плавать. = I know how to swim (Je sais nager)
2. Я знаю, как писать. = I know how to write (Je sais écrire)

The first variant ("Я умею") is better and more natural if you're talking about a general ability, a general skill, but the second variant works as well. I think it works pretty much the same way as in English.

Of course, "я знаю" has different meanings as well, as in the examples:

1. Я знаю его имя! (I know his name!)
2. Я его знаю. (I know him.)
3. Я знаю, что он прав (I know (that) he is right)
4. Я знаю эту книгу (I know this book)