Предмет: Математика, автор: София1134

Помогите пожалуйста сделать задание все. Заранее спасибо. Даю 5 балав

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Ответы

Автор ответа: Аноним
0
2 задание:
Х-300=400
Х=400+300
Х=700
Б) 780-х=730
Х=780-730
Х=50
4 задание:
1 км= 1000м
1 м= 10 дм
1 дм= 100 см
1 см=10 мм
10 см=100 мм
10 см= 1000 мм
10 дм= 1000 см
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