Question

Tính rồi viết kết quả dưới dạng số thập phân:

(3/2 × 5/7 + 3/2 × 7/2 - 3/2 + 3/2) : 3/2

Answer 1

\(\left(\dfrac{3}{2}\times\dfrac{5}{7}+\dfrac{3}{2}\times\dfrac{7}{2}-\dfrac{3}{2}+\dfrac{3}{2}\right):\dfrac{3}{2}\)

\(=\left[\dfrac{3}{2}\times\left(\dfrac{5}{7}+\dfrac{7}{2}\right)-\left(\dfrac{3}{2}-\dfrac{3}{2}\right)\right]:\dfrac{3}{2}\)

\(=\left[\dfrac{3}{2}\times\dfrac{59}{14}-0\right]:\dfrac{3}{2}\)

\(=\dfrac{3}{2}\times\dfrac{59}{14}:\dfrac{3}{2}-0:\dfrac{3}{2}\)

\(=\dfrac{59}{14}-0\)

= \(\dfrac{59}{14}\)

Answer 2

= 59/14

 

Answer 3