2. Calculate:Tính:a.$\frac{3}{4}$ +$\frac{2}{3}$...

a. $\frac{3}{4}$ + $\frac{2}{3}$ + $\frac{5}{12}$ = $\frac{9}{12}$ + $\frac{8}{12}$ + $\frac{5}{12}$ = $\frac{22}{12}$

b. $\frac{7}{8}$ - $\frac{7}{16}$ - $\frac{11}{32}$ = $\frac{28}{32}$ - $\frac{14}{32}$ - $\frac{11}{32}$ = $\frac{3}{32}$

c. $\frac{3}{5}$ x $\frac{2}{7}$ x $\frac{5}{6}$ = $\frac{3 x 2 x 5}{5 x 5 x 7}$ = $\frac{30}{210}$

d. $\frac{15}{16}$ : $\frac{3}{8}$ x $\frac{3}{4}$ = $\frac{15}{16}$ x $\frac{3}{8}$ x $\frac{3}{4}$ = $\frac{15 x 8 x 3}{4 x 16 x 3}$ = $\frac{360}{192}$ = $\frac{15}{8}$

Câu trả lời:
a. $\frac{3}{4}$ + $\frac{2}{3}$ + $\frac{5}{12}$ = $\frac{22}{12}$
b. $\frac{7}{8}$ - $\frac{7}{16}$ - $\frac{11}{32}$ = $\frac{3}{32}$
c. $\frac{3}{5}$ x $\frac{2}{7}$ x $\frac{5}{6}$ = $\frac{30}{210}$
d. $\frac{15}{16}$ : $\frac{3}{8}$ x $\frac{3}{4}$ = $\frac{15}{8}$