Solutions allow parents to better support their children by providing clear examples and correct methodologies for unfamiliar concepts.
While GDZ can be a tempting shortcut, educational research suggests they are most beneficial when used as a learning aid rather than a simple source for copying:
For complex multi-step problems, which are common in 6th grade, solutions help students understand the logical progression of a calculation.
Use the solutions only after attempting a problem to identify specific mistakes.
Гамбарин В.Г., Зубарева И.И.: Сборник задач и ... - OZON
Introduction to positive and negative numbers and the coordinate plane. How to Use Solutions Effectively