Question

2 phần 3 . 15 phần 17 - 5 phần 3 nhân 15 phần 17

Answer 1

\(\dfrac{2}{3}.\dfrac{15}{17}-\dfrac{5}{3}.\dfrac{15}{17}\)
= \(\dfrac{15}{17}.\left(\dfrac{2}{3}-\dfrac{5}{3}\right)\)
\(=\dfrac{15}{17}.\left(-1\right)=-\dfrac{15}{17}\)
đúng đề ko?

Answer 2

\(\dfrac{2}{3}\).\(\dfrac{15}{17}\)-\(\dfrac{5}{3}\).\(\dfrac{15}{17}\)

= \(\dfrac{15}{17}\).(\(\dfrac{2}{3}\)-\(\dfrac{5}{3}\))

= \(\dfrac{15}{17}\).(-1)

=\(-\dfrac{15}{17}\)

Answer 3

\(\dfrac{2}{3}\cdot\dfrac{15}{17}-\dfrac{5}{3}\cdot\dfrac{15}{17}\)

\(=\dfrac{15}{17}\left(\dfrac{2}{3}-\dfrac{5}{3}\right)\)

\(=-\dfrac{15}{17}\)