Question

1. tính nhanh

a) \(15\frac{3}{13}-\left(3\frac{4}{7}+8\frac{3}{13}\right)\)

b) \(\left(7\frac{4}{9}+4\frac{7}{11}\right)-3\frac{1}{2}\)

c) \(\frac{-7}{9}\times\frac{4}{11}+\frac{-7}{9}\times\frac{7}{11}+5\frac{7}{9}\)

Answer 1

giúp em với : Akai Haruma