Bài 4: Tính bằng cách thuận tiện nhất 26/7 x11/3-26/7 x 2/3-6/3 x 26/7 …………………………………………………………………..

$\frac{26}{7}$ x $\frac{11}{3}$ – $\frac{26}{7}$ x $\frac{2}{3}$ – $\frac{6}{3}$ x $\frac{26}{7}$

= $\frac{26}{7}$ x ($\frac{11}{3}$ – $\frac{2}{3}$ – $\frac{6}{3}$)

= $\frac{26}{7}$ x ($\frac{9}{3}$ – $\frac{6}{3}$) 

= $\frac{26}{7}$ x $\frac{3}{3}$ 

= $\frac{26}{7}$ x 1

= $\frac{26}{7}$ 

Chúc bn hok tốt !

# Moon