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: Determining the mass of different groups of objects when given relative differences (e.g., "432 kg less than the second plot").
: Known for a more rigorous, logic-based approach. Used copies in Russian are available through retailers like AbeBooks for around $199. matematika uchebnik dlia chetvertogo klassa.zadachi
: The standard textbook used in many Russian schools, often accompanied by supplementary test books . : Determining the mass of different groups of
: Problems involving travel between towns or relative speeds of different objects. and basic percentages.
: Introduction to natural and fractional numbers, decimal notation, and basic percentages.