Question

bài này rút gọn rồi tính nhé

9/12 +4/7  ;    5/10 + 21/28   ;      7/9 +15/27

Answer 1

\(\frac{9}{12}+\frac{4}{7}\)

\(=\frac{3}{4}+\frac{4}{7}\)

\(=\frac{37}{28}\)

\(\frac{5}{10}+\frac{21}{28}\)

\(=\frac{1}{2}+\frac{3}{4}\)

\(=\frac{5}{4}\)

\(\frac{7}{9}+\frac{15}{27}\)

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

\(=\frac{12}{9}\)

Answer 2

9/12 + 4/7=37/28

5/10 + 21/28 = 5/4

7/9 + 15/27 = 4/3