[tex](3 \frac{1}{2} \div 4 \frac{2}{3} + 4 \frac{2}{3} \div 3 \frac{1}{2} ) \times 4 \frac{4}{5 } [/tex]

(3 1/2 : 4 2/3 + 4 2/3 : 3 1/2) * 4 4/5 = 10,1) 3 1/2 : 4 2/3 = 7/2 : 14/3 = 7/2 * 3/14 = 3/4,2) 4 2/3 : 3 1/2 = 14/3 : 7/2 = 14/3 * 2/7 = 4/3 = 1 1/3,3) 3/4 + 1 1/3 = 3/4 + 4/3 = 9/12 + 16/12 = 25/12 = 2 1/12,4) 2 1/12 * 4 4/5 = 25/12 * 24/5 = 2 * 5 = 10