Question

[Nguyễn Đức Trí]

1. \(25\dfrac{1}{7}:\left(-\dfrac{5}{7}\right)-15\dfrac{1}{7}:\left(-\dfrac{5}{7}\right)+\dfrac{4}{5}\)            3.  \(2\dfrac{2}{3}:\left\{\left[\left(3,72-0.02\right)\dfrac{10}{37}\right]:\dfrac{5}{6}+2,8\right\}-\dfrac{7}{15}\)

2. \(\left(3+\dfrac{4}{5}-\dfrac{5}{12}\right)\left(\dfrac{6}{7}-\dfrac{3}{5}\right)^2\)

4.2³+3.\(\left(-\dfrac{1}{2}\right)^2\)-2².4+\(\left[\left(-2\right)^2:\dfrac{1}{2}\right]\)

Answer 1

[Nguyễn Lê Phước Thịnh]

2: \(=\dfrac{203}{60}\cdot\dfrac{81}{1225}=\dfrac{783}{3500}\)