If you don't have the book in front of you, you can often find digital versions and step-by-step guides on educational platforms like Skysmart or YaKlass.
ГДЗ по математике 1 класса Моро номер 9 с. 57 Учебник (часть 2) If you don't have the book in front
Learning how to use a "measure" (a standard unit) to count how many times it fits into a larger object. If you don't have the book in front
Drawing lines or circles to represent math problems before solving them with numbers. If you don't have the book in front