1. Найдите значение выражения: 1) 8,54 + 3,6; 2) 18,2 − 15,35; 3) 3,02 · 7,5; 4) 4,41 : 6,3; 5) 1/2 + 1/3; 6) 12 3/8 − 8 1/6; 7) 24/65 · 39/40; 8) 1 3/5 : 5 1/3.

1. \(8.54+3.6=12.14\).
2. \(18.2-15.35=2.85\).
3. \(3.02\cdot7.5=22.65\).
4. \(4.41:6.3=0.7\).
5. \(\frac{1}{2}+\frac{1}{3}=\frac{3}{6}+\frac{2}{6}=\frac{5}{6}\).
6. \(12\frac{3}{8}-8\frac{1}{6}=\frac{99}{8}-\frac{49}{6}=\frac{297-196}{24}=\frac{101}{24}=4\frac{5}{24}\).
7. \(\frac{24}{65}\cdot\frac{39}{40}=\frac{3}{5}\cdot\frac{3}{5}=\frac{9}{25}\).
8. \(1\frac{3}{5}:5\frac{1}{3}=\frac{8}{5}:\frac{16}{3}=\frac{8}{5}\cdot\frac{3}{16}=\frac{3}{10}\).

Ответ: 1) 12,14; 2) 2,85; 3) 22,65; 4) 0,7; 5) 5/6; 6) 4 5/24; 7) 9/25; 8) 3/10.