Question

GIÚP MÌNH MAU NHÉ, MÌNH ĐANG CẦN RẤT GẤP!!!!! THANK YOU

a) 3/11 . -5/12 + -3/11 . 7/12 - 4/15

 

b) ( 3/4 - 4/19 + 2015/2016) . ( 1/2 - 1/3 - 1/6)

 

MONG CAC BAN GIUP DO

Answer 1

a) =3/11(-5/12+-7/12)-4/15

= 3/11.(-1)-4/15

=(-3)/11-4/15

=-89/165

 

Answer 2

a)

\(=\frac{3}{11}\left(\frac{-5}{12}+\frac{-7}{12}\right)-\frac{4}{15}\)

\(=\frac{3}{11}\left(\frac{-12}{12}\right)-\frac{4}{15}\)

\(=\frac{3}{11}\left(-1\right)-\frac{4}{15}\)

\(=\frac{3}{11}-\frac{4}{15}\)

\(=\frac{-89}{165}.\)

Answer 3

b) \(\left(\frac{3}{4}-\frac{4}{19}+\frac{2015}{2016}\right).\left(\frac{1}{2}-\frac{1}{3}-\frac{1}{6}\right)\)

 = \(\left(\frac{3}{4}-\frac{4}{19}+\frac{2015}{2016}\right).\left(\frac{3}{6}-\frac{2}{6}-\frac{1}{6}\right)\)

 = \(\left(\frac{3}{4}-\frac{4}{19}+\frac{2015}{2016}\right).0\)

 = 0.