2.5. Demo
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![[Систематика] Разбор задач I олимпиады по математике. 3-4 класс - 1 задача](https://sun9-28.userapi.com/impg/4smFVxr3L9NNX6TdhZY6US8wMt6uldlSxYogjA/y4ia5jkAtdU.jpg?size=320x240&quality=95&keep_aspect_ratio=1&background=000000&sign=2c03ef3dd92ad14a12d389ca948d92ea&c_uniq_tag=A_4QqkZECrET5FaxMsqPIaSffxeiiYKQqnAfCBl2qMo&type=video_thumb)
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