1.94. Түбірдің мәнін табыңдар: 1) √(13²−12²); 2) √(21,8²−18,2²); 3) √(313²−312²); 4) √(17²−64); 5) √(45,8²−44,2²); 6) √(117²−108²); 7) √(6,8²−3,2²); 8) √((2 3/5)²−(2 2/5)²).

1. \(\sqrt{13^2-12^2}=\sqrt{(13-12)(13+12)}=\sqrt{25}=5\).
2. \(\sqrt{21.8^2-18.2^2}=\sqrt{3.6\cdot40}=\sqrt{144}=12\).
3. \(\sqrt{313^2-312^2}=\sqrt{1\cdot625}=25\).
4. \(\sqrt{17^2-64}=\sqrt{289-64}=\sqrt{225}=15\).
5. \(\sqrt{45.8^2-44.2^2}=\sqrt{1.6\cdot90}=\sqrt{144}=12\).
6. \(\sqrt{117^2-108^2}=\sqrt{9\cdot225}=\sqrt{2025}=45\).
7. \(\sqrt{6.8^2-3.2^2}=\sqrt{3.6\cdot10}=\sqrt{36}=6\).
8. \(\sqrt{(2\frac{3}{5})^2-(2\frac{2}{5})^2}=\sqrt{0.2\cdot5}=\sqrt1=1\).

Ответ: 1) 5; 2) 12; 3) 25; 4) 15; 5) 12; 6) 45; 7) 6; 8) 1.