2. Subtract:
a. $\frac{7}{9}$ - $\frac{5}{9}$
b. $\frac{5}{6}$ - $\frac{1}{6}$
c. $\frac{9}{4}$ - $\frac{5}{4}$ - $\frac{1}{4}$
d. $\frac{3}{4}$ - $\frac{2}{5}$
e. $\frac{9}{5}$ - $\frac{11}{10}$
g. $\frac{7}{8}$ - $\frac{1}{6}$
Dịch nghĩa:
2. Trừ:
a. $\frac{7}{9}$ - $\frac{5}{9}$
b. $\frac{5}{6}$ - $\frac{1}{6}$
c. $\frac{9}{4}$ - $\frac{5}{4}$ - $\frac{1}{4}$
d. $\frac{3}{4}$ - $\frac{2}{5}$
e. $\frac{9}{5}$ - $\frac{11}{10}$
g. $\frac{7}{8}$ - $\frac{1}{6}$
Bài Làm:
a. $\frac{7}{9}$ - $\frac{5}{9}$ = $\frac{7 - 5}{9}$ = $\frac{2}{9}$
b. $\frac{5}{6}$ - $\frac{1}{6}$ = $\frac{5 - 1}{6}$ = $\frac{4}{6}$ = $\frac{2}{3}$
c. $\frac{9}{4}$ - $\frac{5}{4}$ - $\frac{1}{4}$ = $\frac{9 - 5 - 1}{4}$ = $\frac{3}{4}$
d. $\frac{3}{4}$ - $\frac{2}{5}$ = $\frac{20}{15}$ - $\frac{6}{15}$ = $\frac{14}{15}$
e. $\frac{9}{5}$ - $\frac{11}{10}$ = $\frac{18}{10}$ - $\frac{11}{10}$ = $\frac{7}{10}$
g. $\frac{7}{8}$ - $\frac{1}{6}$ = $\frac{21}{24}$ - $\frac{4}{24}$ = $\frac{17}{24}$