Thank you for viewing! Gnoble Arithmetic Year 5, 23-book set (with answers) 19 of which are new and unused. 9 books (6, 10-16, 21) have writing on the front, but the back has the same content without writing. *I have checked, but I apologize if I missed anything. 1 Composite Polygons and Area Calculation 5 Problems Related to Numbers 1 - Fractions and Decimals 1 6 Problems Related to Numbers 2 - Fractions and Decimals 2 10 Speed 4 - Movement of Points on Figures 2 11 Volume Calculation of Solids and Water Level 12 Water Depth Changes and Graphs 13 Basics of Percentage - Confirmation of 3 Usages 14 Finding the Base Quantity - Equivalent Calculation 15 Problems Related to Buying and Selling 16 Problems Related to Saltwater 17 Various Word Problems Related to Sum and Difference 18 Word Problems Related to Speed 1 - Traveler's Problem 19 Word Problems Related to Speed 2 - River Current Problem 20 Word Problems Related to Speed 3 - Time Calculation 21 Word Problems Related to Speed 4 - Passing Problem 22 Word Problems Related to Percentage 1 - Work Problem 23 Word Problems Related to Percentage 2 - Multiple Calculation 24 Word Problems Related to Percentage 3 - Equivalent Calculation 25 Word Problems Related to Percentage 4 - Reverse Calculation 26 Area Calculation of Circles and Sectors 2 27 Basics of Similar Figures - Enlargement/Reduction 28 Application of Similar Figures - Area Ratio/Shadow 29 Cones, Pyramids, and Solids of Revolution 30 Newton's Calculation Considering Increase/Decrease There are some creases as they were stored on the bookshelf. These items are from a private individual's home storage. If you are concerned about the detailed condition, please consider another opportunity. Due to past experiences of returns after copying, I am very sorry, but returns are not accepted. We are waiting for purchases only from those who understand. Requests +++ ・Immediate purchase → *⋆⸜ ᵒᵏ ⸝⋆* ・Price reduction → ❌ ・We cannot compensate for any problems during shipping. ・If you have any questions about the product or would like additional product images, please feel free to consult us. ・The product images may appear different from the actual product's color. ・I work during the day, so immediate responses may be difficult. Thank you for your understanding.