If you’ve moved on to the second part of the year, page 57 might be .
Many 4th-grade workbooks use page 57 to practice the (Три склонения имён существительных). 1st Declension: Masculine/Feminine ending in -а/-я . russkii iazyk 4 klass otvety stranitsa 57 uprazhnenie
You are usually asked to rewrite a text while filling in missing letters based on spelling rules. If you’ve moved on to the second part
Reading a riddle (often about an "echo") and identifying pronouns. russkii iazyk 4 klass otvety stranitsa 57 uprazhnenie
Which are you working on so I can give you the exact answer key?
Masculine with zero ending or Neuter ending in -о/-е . 3rd Declension: Feminine with zero ending (ending in ь ).