Question

Tính bằng cách thuận tiện.

a) (398 + 436) + 564                      \(\dfrac{1}{6}\) + ( \(\dfrac{5}{11}\) + \(\dfrac{5}{6}\)) (2,72 + 14,54) + 7,28

b) 181 + 810 + 190 + 919 \(\dfrac{1}{3}\) + \(\dfrac{3}{14}\) + \(\dfrac{10}{15}\) + \(\dfrac{3}{14}\) 57,25 + 64,36 + 5,64 + 42,75