Question

Answer 1

\(1,\\ a,=--\dfrac{1}{2}\\ b,=\dfrac{4}{5}\\ c,=\dfrac{16}{3}-\dfrac{17}{6}=\dfrac{5}{2}\\ d,=\dfrac{14}{5}\times\dfrac{25}{8}=\dfrac{35}{4}\\ 2,\\ a,=9,6m\\ b,=5,062.tấn\\ c,=2,05cm^2\\ 3,\)

Diện tích là \(\left(2000:4\right)\times\left(2000:4\right)=250000\left(m^2\right)=25\left(ha\right)\)

Answer 2

a: \(\dfrac{1}{3}-\dfrac{5}{6}=\dfrac{2}{6}-\dfrac{3}{6}=-\dfrac{1}{2}\)

b: \(\dfrac{6}{7}:\dfrac{15}{14}=\dfrac{6}{7}\cdot\dfrac{14}{15}=\dfrac{84}{105}=\dfrac{4}{5}\)