(1 9/16 × 3 1/5 + 6 2/3 - 9 : 2 2/5) : (17 7/12 - 6 1/3)

1) [latex]1 \frac{9}{16}*3 \frac{1}{5} = \frac{25*16}{16*5}= 5[/latex] 2) [latex]9:2 \frac{2}{5}= 9:2,4=3,75[/latex] 3) 5+[latex]6 \frac{2}{3} [/latex]=[latex]11 \frac{2}{3} [/latex] 4) [latex]11 \frac{2}{3}- 3,75= 11\frac{2}{3}-3 \frac{3}{4}= \frac{35}{3}- \frac{15}{4}= \frac{140-45}{12} = \frac{95}{12} = 7 \frac{11}{12} [/latex] 5) [latex]17 \frac{7}{12}- 6 \frac{1}{3}= \frac{211-76}{12} = \frac{135}{12} = \frac{45}{4} = 11 \frac{1}{4} [/latex] 6) [latex]7 \frac{11}{12}:11 \frac{1}{4}= \frac{95*4}{12*45} = \frac{19*1}{3*9}= \frac{19}{27} [/latex] Ответ: [latex] \frac{19}{27} [/latex]