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1. \(\sqrt{245}\)
2. \(\sqrt{196}\)
3. \(\sqrt{36}\)
4. \(\sqrt{243}\)
5. \(\sqrt{1296}\)
6. \(\sqrt{900}\)
7. \(\sqrt{864}\)
8. \(\sqrt{45}\)
9. \(\sqrt{605}\)
10. \(\sqrt{18}\)
11. \(\sqrt{640}\)
12. \(\sqrt{75}\)

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Verbetersleutel

1. \(\sqrt{245}=\sqrt{49 \cdot 5}=\sqrt{49}\cdot \sqrt{5}=7\sqrt{5}\)
2. \(\sqrt{196}=14\)
3. \(\sqrt{36}=6\)
4. \(\sqrt{243}=\sqrt{81 \cdot 3}=\sqrt{81}\cdot \sqrt{3}=9\sqrt{3}\)
5. \(\sqrt{1296}=\sqrt{324 \cdot 4}=\sqrt{324} \cdot \sqrt{4}=18 \cdot 2=36\)
6. \(\sqrt{900}=\sqrt{9 \cdot 100}=\sqrt{9} \cdot \sqrt{100}=3 \cdot 10=30\)
7. \(\sqrt{864}=\sqrt{144 \cdot 6}=\sqrt{144}\cdot \sqrt{6}=12\sqrt{6}\)
8. \(\sqrt{45}=\sqrt{9 \cdot 5}=\sqrt{9}\cdot \sqrt{5}=3\sqrt{5}\)
9. \(\sqrt{605}=\sqrt{121 \cdot 5}=\sqrt{121}\cdot \sqrt{5}=11\sqrt{5}\)
10. \(\sqrt{18}=\sqrt{9 \cdot 2}=\sqrt{9}\cdot \sqrt{2}=3\sqrt{2}\)
11. \(\sqrt{640}=\sqrt{64 \cdot 10}=\sqrt{64}\cdot \sqrt{10}=8\sqrt{10}\)
12. \(\sqrt{75}=\sqrt{25 \cdot 3}=\sqrt{25}\cdot \sqrt{3}=5\sqrt{3}\)