Addition av bråk: [url=https://www.geogebra.org/m/nvRFch43]https://www.geogebra.org/m/nvRFch43[/url][br]Multiplikation av bråk: [url=https://www.geogebra.org/m/Mr57aYed]https://www.geogebra.org/m/Mr57aYed[/url] [br]Två tallinjer: [url=https://www.geogebra.org/m/vP4BDEP7]https://www.geogebra.org/m/vP4BDEP7[/url][br]Lång division: [url=https://www.geogebra.org/m/sfywpray]https://www.geogebra.org/m/sfywpray[/url]  [br]Kort division: [url=https://www.geogebra.org/m/pkmzs9me]https://www.geogebra.org/m/pkmzs9me[/url][br]Låga primtal: [url=https://www.geogebra.org/m/gxrY37Af]https://www.geogebra.org/m/gxrY37Af[/url][br]Taluppfattning: [url=https://www.geogebra.org/m/u4dhur4e]https://www.geogebra.org/m/u4dhur4e[/url]