Предмет: Математика, автор: tamarazimareva

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Автор ответа: iramazurk
1

Пошаговое объяснение:

1 дм = 10 см

1дм 2 см = 10 см + 2 см = 12 см

АВ = 12 см

СД = 3 см

1) 12 - 3 = 9 (см) - АВ длинее СД

2) 12 - 3 = 9 (см) - СД короче АВ

3) 12 : 3 = 4 (раза) - в 4 раза АВ длинее СД

4) 12 : 3 = 4 (раза) - в 4 раза СД короче АВ

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