Question

Tinh bang cach gop li

^{\(\frac{1}{2}\left(\frac{2}{9}+\frac{3}{7}-\frac{5}{27}\right)\)}

 

Answer 1

1/2 . ( 2/9 + 3/7 - 5/27 )

=1/2 . ( 2/9-5/27)+3/7

=1/2 . (1/27+3/7)

=1/2 .

Answer 2

=1/2x88/189=44/189

Answer 3

\(\frac{1}{2}\times\left(\frac{2}{9}+\frac{3}{7}-\frac{5}{21}\right)\)

\(=\frac{1}{2}\times\frac{88}{189}\)

\(=\frac{44}{189}\) 

Học Tốt

Answer 4

\(\frac{1}{2}\left(\frac{2}{9}+\frac{3}{7}-\frac{5}{27}\right)\)

\(=\frac{1}{2}.\left(\frac{2}{9}-\frac{5}{27}\right)+\frac{3}{7}\)

\(=\frac{1}{2}.\left(\frac{1}{27}+\frac{3}{7}\right)\)

\(=\frac{1}{2}.\frac{88}{189}\)

\(=\frac{44}{189}\)