mình làm chi tiết nha bn
\(\dfrac{4}{16}-\dfrac{5}{10}+2=\dfrac{20}{80}-\dfrac{40}{80}+\dfrac{160}{80}=\dfrac{140}{80}=\dfrac{7}{4}\)
\(\dfrac{4}{16}-\dfrac{5}{10}+2\)
=\(\dfrac{1}{4}+\dfrac{1}{2}+2\)
=\(\dfrac{1}{4}+\dfrac{2}{4}+\dfrac{8}{4}\)
=\(\dfrac{11}{4}\)
4/16 - 5/10 + 2
=1/4 - 1/2 +2
= 1/4 + 2/4 + 2
= 3/4 + 2
=3/4 + 4/4
=7/4