Project Gutenberg 2005-08-14 Public domain in the USA. 2835 Rachinskii, Sergei Aleksandrovich 1836 1902 Рачинский, Сергей Александрович Rachinskij, Sergej Aleksandrovich 1001 задача для умственного счета 1001 tasks for mental calculation - "1001 задача для умственного счета" by Sergei Aleksandrovich Rachinskii is a mathematical workbook written in the late 19th century. This collection contains a vast array of arithmetic problems designed for educational purposes, particularly for use in classrooms. The problems are presented in a straightforward language, often contextualized in practical scenarios, enabling learners to enhance their mental calculation skills. The opening of this workbook introduces the format and structure of the challenges included. It details that the tasks are tailored for students and can be applied in arithmetic lessons. The first few examples presented illustrate various calculations involving reading, purchasing land, and budgeting, emphasizing real-world situations that require mental arithmetic. Each problem is followed by a solution, which helps learners verify their understanding and mastery of the concepts presented. (This is an automatically generated summary.) ru Word problems (Mathematics) Mathematics -- Problems, exercises, etc. QA Text Category: Mathematics Category: Teaching & Education 280179 2025-08-07T07:29:11.279900 text/html 176009 2020-12-12T09:44:13 text/html 152638 2025-08-07T07:29:16.876871 application/epub+zip 155219 2025-08-07T07:29:13.872882 application/epub+zip 134891 2025-08-07T07:29:12.833887 application/epub+zip 332043 2025-08-07T07:29:18.870857 application/x-mobipocket-ebook 321835 2025-08-07T07:29:16.271890 application/x-mobipocket-ebook 288004 2022-09-08T05:57:28.172823 application/x-mobipocket-ebook 271490 2025-08-07T07:29:10.747912 text/plain; charset=us-ascii 171273 2020-12-12T09:44:13 text/plain; charset=us-ascii 18589 2025-08-07T07:29:19.086841 application/rdf+xml 15943 2025-08-07T07:29:13.331868 image/jpeg 3953 2025-08-07T07:29:13.081879 image/jpeg 59252 2020-12-12T09:44:13 application/octet-stream application/zip 57631 2020-12-12T09:44:13 application/octet-stream application/zip 150151 2025-08-07T07:29:11.303890 application/octet-stream application/zip Archives containing the RDF files for *all* our books can be downloaded at https://book.klll.cc/wiki/Gutenberg:Feeds#The_Complete_Project_Gutenberg_Catalog ru.wikipedia