\(\frac{8}{40}-\frac{36}{45}\) \(\frac{8}{18}+\frac{15}{27}\)
\(=\frac{1}{5}-\frac{4}{5}\) \(=\frac{4}{9}+\frac{5}{9}\)
\(=-\frac{3}{5}\) \(=\frac{9}{9}\)
\(=1\)
a) \(\frac{8}{40}-\frac{36}{45}=\frac{1}{5}-\frac{4}{5}=-\frac{3}{5}\)
b)\(\frac{8}{18}+\frac{15}{27}=\frac{4}{9}+\frac{5}{9}=\frac{9}{9}=1\)
chúc bn hok tốt
a, \(\frac{8}{40}\)- \(\frac{36}{45}\)
= \(\frac{1}{5}\)- \(\frac{4}{5}\)
= - \(\frac{3}{5}\)
b, \(\frac{8}{18}\)+ \(\frac{15}{27}\)
= \(\frac{4}{9}\)+ \(\frac{5}{9}\)
= \(\frac{9}{9}\)
= 1
Các bạn làm sai con a rồi 1/5-4/5làm sao trừ đc