: If you are specifically looking for the "Workbook of Educational Achievements" (Tetrady uchebnykh dostizheniy) by the same author, it is also available online to help students self-check their progress. Key Topics Covered in Part 1

: Mastering place value and reading large numbers.

: While these "GDZ" sites are great for checking work, try to solve the problems yourself first to make sure you've got the logic down for your next class test!

: Techniques for adding and subtracting three-digit numbers.