Question

Thực hiện phép tính

1) 5\(\dfrac{25}{7}\)+ \(\dfrac{27}{23}\)+0.5-\(\dfrac{5}{27}\)+\(\dfrac{16}{23}\)

2) (-0.75 - \(\dfrac{1}{4}\)) : (-5) + \(\dfrac{1}{15}\) -(-\(\dfrac{1}{5}\)) : (-3)

Answer 1

\(1:5\dfrac{25}{7}+\dfrac{27}{23}+0,5-\dfrac{5}{27}+\dfrac{16}{23}\)

\(=\dfrac{60}{7}+\left(\dfrac{27}{23}+\dfrac{16}{23}\right)+0,5-\dfrac{5}{27}\)

\(=\dfrac{60}{7}+\dfrac{43}{23}+0,5-\dfrac{5}{27}\)

\(=\dfrac{1681}{161}+\dfrac{1}{2}-\dfrac{5}{27}\)

\(=\dfrac{3523}{322}-\dfrac{5}{27}\)

\(=10,7558086\)

\(2:\left(-0,75-\dfrac{1}{4}\right):\left(-5\right)+\dfrac{1}{15}-\left(-\dfrac{1}{5}\right):\left(-3\right)\)

\(=-1:\left(-0,5\right)+\dfrac{1}{15}-\dfrac{1}{15}\)

\(=2+0=2\)