Hogyan működik a szorobán? #4
Hogyan működik a szorobán? 4. videó
Tízes váltással járó összeadás és kivonás
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![NATO: mi az, miért létezik es hogyan működik? (Hungarian version) [2017]](https://sun9-63.userapi.com/5oKvLzTDT2RMS1n4vXhM3zUUug573IAWRYDhtg/TxDVGztTbPo.jpg)
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