How To Use
Way Of Using
You've seen the word 使う hopefully by now. If you have, you know it means "to use." So, the way to use something is the way of using (aka how to use). This will be a word you see when you're looking at directions for how to use something.
つかいかた
The readings come from the vocab words 使う and 方. So long as you're okay with those you can apply that knowledge over here.
もう少し、言葉の使い方に気を付けた方がいいでしょ。
You should be more careful about how you use language.
アイフォンの使い方が分かりません。
I don't know how to use iPhones.
一緒に仕事ができるように、俺の犬に金槌の使い方を訓練してみようと思うんだ。
I’m going to train my dog how to use a hammer and bring him to work with me.