Question

[Sách Giáo Khoa]

Tính 

​a) \(\dfrac{3}{7}+\left(-\dfrac{5}{2}\right)+\left(-\dfrac{3}{5}\right)\) ;                    b) \(\left(-\dfrac{4}{3}\right)+\left(-\dfrac{2}{5}\right)+\left(-\dfrac{3}{2}\right)\);
c) \(\dfrac{4}{5}-\left(-\dfrac{2}{7}\right)-\dfrac{7}{10}\) ;                             d) \(\dfrac{2}{3}-\left[\left(\dfrac{-7}{4}\right)-\left(\dfrac{1}{2}+\dfrac{3}{8}\right)\right]\).

Answer 1

[Thien Tu Borum]

a) =

b) = =

c) =

d) =

Answer 2

[Nguyễn Thị Thảo]

Lời giải:

a) =

b) = =

c) =

d) =