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1. \(\sqrt{ 225 - 144}\)
2. \(\sqrt{ 25 } - \sqrt{ 9 }\)
3. \(\sqrt{ 9 + 16}\)
4. \(\sqrt{ 25 - 16}\)
5. \(\sqrt{ 36 + 64}\)
6. \(\sqrt{ 25 - 9}\)
7. \(\sqrt{ 81 } + \sqrt{ 144 }\)
8. \(\sqrt{ 25 + 144}\)
9. \(\sqrt{ 81 + 144}\)
10. \(\sqrt{ 169 } - \sqrt{ 144 }\)
11. \(\sqrt{ 100 - 36}\)
12. \(\sqrt{ 100 } - \sqrt{ 64 }\)

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Verbetersleutel

1. \(\sqrt{ 225 - 144}=\sqrt{81} = 9\)
2. \(\sqrt{ 25 } - \sqrt{ 9 }=5-3=2\)
3. \(\sqrt{ 9 + 16}=\sqrt{25} = 5\)
4. \(\sqrt{ 25 - 16}=\sqrt{9} = 3\)
5. \(\sqrt{ 36 + 64}=\sqrt{100} = 10\)
6. \(\sqrt{ 25 - 9}=\sqrt{16} = 4\)
7. \(\sqrt{ 81 } + \sqrt{ 144 }=9+12=21\)
8. \(\sqrt{ 25 + 144}=\sqrt{169} = 13\)
9. \(\sqrt{ 81 + 144}=\sqrt{225} = 15\)
10. \(\sqrt{ 169 } - \sqrt{ 144 }=13-12=1\)
11. \(\sqrt{ 100 - 36}=\sqrt{64} = 8\)
12. \(\sqrt{ 100 } - \sqrt{ 64 }=10-8=2\)