Question

\(\frac{5}{9}\)+\(\frac{2}{7}\)+\(\frac{6}{14}\)+\(\frac{20}{18}\)=?

Answer 1

=(5/9+20/18)+(2/7+6/14)

=(5/9+10/9)+(2/7+3/7)

=15/9+5/7

=50/21

Answer 2

=50/21

Nhớ

Answer 3

\(\frac{5}{9}\)+\(\frac{2}{7}\)+\(\frac{6}{14}\)+\(\frac{20}{18}\)=\(\frac{50}{21}\)

Answer 4

\(\frac{5}{9}+\frac{2}{7}+\frac{6}{14}+\frac{20}{18}\)

\(=\frac{5}{9}+\frac{2}{7}+\frac{3}{7}+\frac{10}{9}\)

\(=\left(\frac{5}{9}+\frac{10}{9}\right)+\left(\frac{2}{7}+\frac{3}{7}\right)\)

\(=\frac{15}{9}+\frac{5}{7}\)

\(=\frac{5}{3}+\frac{5}{7}=\frac{50}{21}\)

Answer 5

5/9 + 2/7 + 6/14 + 20/18 

 = 5/9 + 2/7 + 3/7 + 10/9 

 = ( 5/9 + 10/9 ) + ( 2/7 + 3/7 ) 

 = 15/9 + 5/7 

= 105/63 + 45/63 = 150/63

/ là phần nhé

Answer 6

\(\frac{5}{9}+\frac{2}{7}+\frac{6}{14}+\frac{20}{18}\)

\(=\left(\frac{5}{9}+\frac{10}{9}\right)+\left(\frac{4}{14}+\frac{6}{14}\right)\)

\(=\frac{15}{9}+\frac{7}{5}\)

\(=\frac{105}{45}+\frac{63}{45}=\frac{50}{21}\)

Answer 7

50/21