Both are correct. It's the same word. You will find both versions used, though I would reckon that in this case the kana version is a more common. There are no hard orthographic rules that require you to use only kanji or only kana in some places, you need to pick up from the texts you read which usage is more common.
If you goal is just to pass N5, the actual amount of kanji you will be required to be able to read is low, so if you find very difficult kanji in your vocabulary, there is a chance you will do fine without being able to recognise it.
However, if you not only want to pass N5, but afterwards learn more Japanese, then you should learn as much kanji versions as possible, because if you can't read these, you will get problems later on. If the kanji version is really not that common, then the entry on jisho.org will normally say "Usually written using kana alone". Here's an example where this is the case: http://jisho.org/word/何処 In these cases you should be fine without explicitly learning the kanji version.
Thank you. That's really help. I think I should study all the version. I want to learn japanese more than just passing the test.
Btw, can you tell me the proper way to study japanese? I just completed studying Kanji N5 and starting to learn vocabulary. But when I see Kanji outside N5 I'm confuse. Because I can't read it. Should I study all the Kanji from Vocabulary N5 first then the Vocabulary?
Well, think about what skills you want to achieve and then model your study method after them. I'd say being able to recognise words is the minimum you should go for, because you'll need this skill if you ever want to read an actual book or something. In the end, vocabulary is what matters. You need to know the correct reading and meaning of a word when you see it. Studying single kanji is mostly just a means of making studying vocabulary more accessible, structured and faster.
But of course, there are also people who can speak Japanese just fine without being able to read everything. They're not in the wrong, they just developed a different skill-set. So decide what skill-set you want to have in the future and then study with that goal in mind.
OK. I think I know what I want to do now.
Thank you for your big help. I really appreciate it. May god rewards all of your kindness.
ik im a little late, this convo is about 4 years ago lol, but i just wanted to thank you, the advice is really helpful
Which one of "Asatte" is right?
Please anyone help me. I want to study n5 vocabulary. But i found this word have 2 version. One with kanji and one with kana. Which one should I study. It doesn't only this word. There's many word like this. Please help me.