Question

もんぶらん

This pencil is half as cheap as that one.
This pencil is twice as cheap as that one.
この二文は同じ意味ですか？
また、
I have twice as many books as her.
I have half as many books as her.
この二文は同じ意味ですか？

Answer 1

🩰🧴🐇

This pencil is half as cheap as that one.
この鉛筆はあの鉛筆の半分の安さです。
This pencil is twice as cheap as that one.
この鉛筆はあの鉛筆の2倍の安さです。

I have twice as many books as her.
私は彼女の2倍の本を持っている。
I have half as many books as her.
私は彼女の半分の本を持っている。

という意味になります。