Giải thích các bước giải:
Ta có:
$A=\dfrac{1.6:(1\dfrac35\cdot 1.25)}{0.64-\dfrac1{25}}+\dfrac{(1.08-\dfrac2{25}):\dfrac47}{(5\dfrac59-2\dfrac14)\cdot 2\dfrac2{17}}+0.6\cdot 0.5:\dfrac25$
$\to A=\dfrac{\dfrac85:(\dfrac85\cdot \dfrac54)}{\dfrac{16}{25}-\dfrac1{25}}+\dfrac{(\dfrac{27}{25}-\dfrac2{25})\cdot \dfrac74}{(\dfrac{50}9-\dfrac{9}4)\cdot \dfrac{36}{17}}+\dfrac35\cdot \dfrac12\cdot \dfrac52$
$\to A=\dfrac{\dfrac85:2}{\dfrac{15}{25}}+\dfrac{1\cdot \dfrac74}{\dfrac{119}{36}\cdot \dfrac{36}{17}}+\dfrac34$
$\to A=\dfrac{\dfrac45}{\dfrac{15}{25}}+\dfrac{\dfrac74}{7}+\dfrac34$
$\to A=\dfrac{4}{3}+\dfrac14+\dfrac34$
$\to A=\dfrac{4}{3}+1$
$\to A=\dfrac73$
