Just contact its publishing house, and the staff is very friendly. Remember to call during office hours-

Call 022-23542233. You can also call Tianjin Normal University and ask for the editorial department of Secondary Mathematics.

Answer supplement

The single book is priced in 3 yuan, and there is a discount for buying more. The price of the middle school mathematics competition supplement is also quite reasonable. Please ask me specifically. Every time I buy a book, I always spend more money than postage. ...

Postal code: 300074