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In the textbook, I read this: 67.5读作六十七点五.
What's the role of 读作？ Why 读作 is there？
You can replace 读作 with 'read as'
The sentence can be translated as:
67.5 reads as 六十七点五
Meaning: is read as
e.g. (a number) is read as something.
Don't mix it up with 叫做. 叫做 refers to names, 读作 refers to language.
Required, but never shown