1.Вырази в тоннах и центнерах
25ц,154ц,306ц,255ц,3500кг
2.выполни указанные действия
5т+8ц=
2т1ц-9ц=
4т5ц+6ц=
6т4ц-8ц=
4т5ц+6ц=
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