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Ответ:

[tex]a=2\dfrac{1}{4}=\dfrac{9}{4}\ \ ,\ \ b=0,2=\dfrac{2}{10}=\dfrac{1}{5} \\\\\\\Big(a:1\dfrac{1}{2}-0,2\Big):b=\Big(a:\dfrac{3}{2}-\dfrac{1}{5}\Big):b=\Big(a\cdot \dfrac{2}{3}-\dfrac{1}{5}\Big):b=\Big(\dfrac{9\cdot 2}{4\cdot 3}-\dfrac{1}{5}\Big):\dfrac{1}{5}=\\\\\\=\Big(\dfrac{3}{2}-\dfrac{1}{5}\Big)\cdot \dfrac{5}{1}=\dfrac{15-2}{10}\cdot 5=\dfrac{13\cdot 5}{10}=\dfrac{13}{2}=6,5[/tex]

Ответ:

6,5

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