This is the third volume of the "Difficult Problem Solutions" collection, a 365-day calculation textbook specifically for fifth-grade arithmetic. - Title: Grade 5 Arithmetic (365-Day Calculation Textbook) "Difficult Problem Solutions" Volume 3 ① - Title: Grade 5 Arithmetic (365-Day Calculation Textbook) "Difficult Problem Solutions" Volume 3 ② - Period: October 11th to December 12th - Period: December 13th to January 31st Hama Gakuen Grade 5 Thank you for viewing.