19×19 Mental Math Workbook | Japanese Book | 小学生がたった1日で暗算できる本 | Like New
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Condition: Like New. No writing, clean pages, no damage. Stored in a smoke-free, pet-free home. Item Details: “⼩学⽣がたった1⽇で19×19まで暗算できる本 – 計算の達人編” ...