f8084e4-85ca-4b83-bce4-c55a3ddb2648/55410/" http://school-collection. edu. ru/catalog/rubr/df8084e4-85ca-4b83-bce4-c55a3ddb2648/55410/
3. Обыкновенные дроби - HYPERLINK "http://schools. keldysh. ru/sch1905/drobi/index. htm" o "http://schools. keldysh. ru/sch1905/drobi/index. htm" http://schools. keldysh. ru/sch1905/drobi/index. htm
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