Condition: * Some pages (6, 7, 11, 12, 13) have red pen markings for grading. There are no other writings on the other pages. * The answer key and explanations were used separately and detached. Please refer to the photos. * Comments and price negotiations are not accepted. Please check the condition in the photos. * As this is a used item, there are signs of wear and tear such as yellowing and scratches on the cover and inside, but there is no damage that would hinder reading. This is a math problem book for 5th graders, designed to enhance critical thinking skills. - Title: Z-Kai Grade Up Problem Book (Revised Edition) Elementary School 5th Grade Math (Humanities) - Publisher: Z-KAI - Target Grade: 5th Grade Elementary School - Problem Type: Math - Price: 990 yen Shipping: * Waterproof packaging will be used for shipping. * Anonymous shipping is available (for Mercari). * Shipping costs are included. Please purchase only if you understand the above. No claims and no returns. Please refrain from purchasing if you are concerned. Instant purchase is OK. Thank you for viewing.