20 days, 20th of the month Noun
The 20th of next month is my little brother's birthday.
three days, 3rd of the month Noun
It took three days for the letter to arrive.
five days, 5th of the month Noun
May 5th is a holiday.
eight days, 8th of the month Noun
( )からイギリスに
I go to England on the eighth.
two days, 2nd of the month Noun
I waited two days.
nine days, 9th of the month Noun
( )に
The package will arrive on the ninth.
place Noun
I stayed at my friend's place for the night.
Spaced repetition is a study technique that schedules reviews right before you're likely to forget something. Cards you know well are shown less often; cards you struggle with come back sooner. It's the same underlying method Anki popularized, and the one Decks uses.
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Decks ships curated decks for Japanese, Chinese, Spanish, and French, covering everything from writing systems (hiragana, katakana) to grammar (HSK, Tae Kim's guide) to vocabulary and full sentences. You can also build decks for any other language or subject.