I have math on Monday and Friday.

我星期一和星期五有数学课。

youdao

I have math lessons on Friday.

我周五有数学课。

youdao

I have math on Monday, Wednesday and Friday.

在星期一、星期三和星期五我有数学课。

youdao

I have math on Monday, Wednesday and Friday. (P74).

我星期一、星期三、星期五上数学课。

youdao

I have math on Monday, Wednesday and Friday. (P74).

我星期一、星期三、星期五上数学课。

youdao