Question

tính bằng cách nhanh nhất:

  1.4 x26 x5.6

   \(\dfrac{6}{11}\) x \(\dfrac{3}{7}\) + \(\dfrac{3}{7}\) x \(\dfrac{5}{11}\)

Answer 1

\(\dfrac{6}{11}.\dfrac{3}{7}+\dfrac{3}{7}.\dfrac{5}{11}\)

\(=\dfrac{3}{7}.\left(\dfrac{6}{11}+\dfrac{5}{11}\right)\)

\(=\dfrac{3}{7}.1=\dfrac{3}{7}\)

Answer 2

1.4x26x5.6=203.84

\(\dfrac{6}{11}x\dfrac{3}{7}+\dfrac{3}{7}x\dfrac{5}{11}=\dfrac{3}{7}x\left(\dfrac{6}{11}+\dfrac{5}{11}\right)=\dfrac{3}{7}x1=\dfrac{3}{7}\)

Answer 3