Question

tính.

Answer 1

Ta có : \( \(\dfrac{7}{19}.\dfrac{8}{11}+\dfrac{7}{19}.\dfrac{3}{11}-\dfrac{26}{19}\)\)

= \(\dfrac{1}{19}\left(\dfrac{7.8}{11}+\dfrac{7.3}{11}-26\right)=\dfrac{1}{19}\left(\dfrac{77}{11}-26\right)=\dfrac{1}{19}.\left(7-26\right)=\dfrac{1}{19}\left(-19\right)=-1\)

Answer 2

sory , mk nam nay moi len lop sau nen ko biet lam , sory nha