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Математика 2 клас

усний рахунок

QuestionAnswer
Як називаються числа при додаванні? Доданок, доданок, сума
Як називаються числа при відніманні? Зменшуване, від'ємник, різниця.
Що невідомо? 50+... =100 доданок 50
Що невідомо? ...+ 12= 24 доданок 12
Як знайти невідомий від'ємник? Потрібно від зменшуваного відняти різницю.
Як знайти невідомий доданок? Потрібно від суми відняти відомий доданак.
Як знайти невідоме зменшуване? Потрібно до різниці додати від'ємник.
Що невідомо? ... - 23 = 12 зменшуване 35
Що невідомо? 56 - .... = 6 від'ємник 50
Created by: Nadia091169
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