Question

[Pham Trong Bach]

Tính hợp lí:

a)  $-\frac{3}{13}+\frac{7}{12}-\frac{10}{13}+\frac{5}{12}$

b)  $\frac{15}{24}-\frac{6}{26}+\frac{28}{48}-\frac{30}{39}+\frac{10}{24}$

Answer 1

[Cao Minh Tâm]

a) 0

b) 5 8