The most comprehensive solutions are available on the following sites:
: Offers answers for both the newer 2015 edition and older versions (like 2004). reshebnik onlajn po matematiki 4 klass m.v.bogdanovich
: A user-friendly digital version of the 2015 textbook solutions, accessible on mobile and desktop. The most comprehensive solutions are available on the
: Numeration and operations for numbers greater than 1,000. reshebnik onlajn po matematiki 4 klass m.v.bogdanovich