How to write こたえ: 答え or 答?


In the microsoft IME keyboard, and my cellphone's as well, when I write こたえ it
is suggested 答え. However, in the Genki I textbook, I've seen it written as

> 答{こたえ}

Are both of these valid? If so, which is more normal to use?




Both are valid, but 答え is more normal to use.  
However, you cannot use 答る instead of 答える (verb).

Therefore,

> ○ 答えを見る。  
>  ○ 答を見る。
>
> ○ その問いに答える。  
>  × その問に答る。

References
<http://www.mext.go.jp/b_menu/hakusho/nc/k19730618001/k19730618001.html>




Both are valid, but 答え is more normal to use.  
However, you cannot use 答る instead of 答える (verb).

Therefore,

> ○ 答えを見る。  
>  ○ 答を見る。
>
> ○ その問いに答える。  
>  × その問に答る。

References
<http://www.mext.go.jp/b_menu/hakusho/nc/k19730618001/k19730618001.html>

