かみかみ is a slang word that comes from verb 噛む – “to chew”, but also “to fumble or falter with one’s words”. So かみかみ = flater, mammer, stammer, sbumble, stutter.

So, it’s like: Your pronunciation is bad, but otherwise your Japanese is great!

Actually, Wikipedia has a nice page on numbers and counters: http://en.wikipedia.org/wiki/Japanese_counter_word. Look at the table in “Euphonic changes” section. If you are interested in changes that occur when number comes before ぴゃく, just look at the h- column – changes are いっぴゃく，さんびゃく etc.

It’s 言っておいて with half kana eaten :D

Thx Mark :D I found out what the も part means. In this sentence it means “as much as”. Then, sentence would translate to something like: “It’s quite natural to be as angry as she is (given the situation)”.

夢を見る　is a phrase for dreaming. こんな夢を見た would be “I had this kind of dream”. “This” is probably described in previous sentence.

用件をメモしておきました。 (I made a note of the matter.)

Which verb is おきました? 置く? In that case, could maybe a translation be more like: “I made a note (list) of things to be done”?