Question

-3/2.3-3/3.4-3/4.5-3/5.6-3/6.7

Answer 1

-19,35

Answer 2

\(=-3\left(\dfrac{1}{2}-\dfrac{1}{3}+\dfrac{1}{3}-\dfrac{1}{4}+\dfrac{1}{4}-\dfrac{1}{5}+\dfrac{1}{5}-\dfrac{1}{6}+\dfrac{1}{6}-\dfrac{1}{7}\right)=-3\cdot\dfrac{5}{14}=-\dfrac{15}{14}\)

Answer 3

tính binh thường trong mày tính thì sẽ bằng \(\dfrac{207}{20}\)