整理 J 動詞や名詞の意味を広げる文法形式 教科書 p.96
The pattern expands the verb/noun meaning
接続：Vます remove ます + やすい
easy to do. Refers to ease of implementation or likelihood.
注意 / Note：Check the subject, tense and tone of both clauses; Avoid translating word for word from Vietnamese.
比較 / Compare：Compare with similar samples in the same article to choose according to nuance and connection. Same 課: 〜かける／〜かけだ／〜きる／〜通す／〜出す／〜にくい／〜づらい／〜すぎる／〜がちだ／〜らしい／〜っぽい／〜のようだ／〜みたいだ／〜だらけだ — these models are often mistaken for each other, read the 接続 line carefully and then decide.
このペンは書きやすいです。
This pen is easy to write with.
この本は分かりやすいです。
This book is easy to understand.
このアプリは文字が大きくて、操作しやすいです。
This application has large text so it is easy to operate.