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Матемитика

Узагальнення і систематизація навчального матеріалу за 2 клас

QuestionAnswer
Переставний закон додавання a+b=b+a
Сполучний закон додавання (a+b)+c=a+(b+c)
Щоб знайти невідомий доданок, потрібно від суми відняти відомий доданок
Щоб знайти невідоме зменшуване, потрібно до різниці додати від*ємник
Щоб знайти невідомий від*ємник, потрібно від зменшуваного відняти різницю
Від перестановки множників добуток не змінюється a*b=b*a
Периметр квадрата зі стороною а можна знайти так P=a*4
Периметр прямокутника зі сторонами a і b обчислюється так P=(a+b)*2
Created by: 697297700468292
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