Question

[Hoang Kim Thuong]

a)1/5+4/11+4/5+7/11=

b)5/6+(5/9-1/4)=

gup mik voi a

Answer 1

[Leonor]

\(a.\frac{1}{5}+\frac{4}{11}+\frac{4}{5}+\frac{7}{11}\)

\(=\left(\frac{1}{5}+\frac{4}{5}\right)+\left(\frac{4}{11}+\frac{7}{11}\right)\)

\(=\frac{5}{5}+\frac{11}{11}\)

\(=1+1\)

\(=2\)

\(b.\frac{5}{6}+\left(\frac{5}{9}-\frac{1}{4}\right)\)

\(=\frac{5}{6}+\left(\frac{20}{36}-\frac{9}{36}\right)\)

\(=\frac{5}{6}+\frac{11}{36}\)

\(=\frac{30}{36}+\frac{11}{36}\)

\(=\frac{41}{36}\)