a) \(A=\left(\dfrac{3}{4}:\dfrac{2}{3}\right):\dfrac{3}{5}=\left(\dfrac{3}{4}\cdot\dfrac{3}{2}\right)\cdot\dfrac{5}{3}=\dfrac{9}{8}\cdot\dfrac{5}{3}=\dfrac{15}{8}\)
b) \(B=\dfrac{3}{4}:\left(\dfrac{2}{5}:\dfrac{3}{5}\right)=\dfrac{3}{4}:\left(\dfrac{2}{5}\cdot\dfrac{5}{3}\right)=\dfrac{3}{4}:\dfrac{2}{3}=\dfrac{3}{4}\cdot\dfrac{3}{2}=\dfrac{9}{8}\)
c) \(C=\left(\dfrac{11}{12}:\dfrac{33}{16}\right)\cdot\dfrac{3}{5}=\left(\dfrac{11}{12}\cdot\dfrac{16}{33}\right)\cdot\dfrac{3}{5}=\dfrac{4}{9}\cdot\dfrac{3}{5}=\dfrac{4}{15}\)
a.
A=\(\left(\dfrac{3}{4}:\dfrac{2}{3}\right):\dfrac{3}{5}\)
=\(\left(\dfrac{3}{4}.\dfrac{3}{2}\right):\dfrac{3}{5}\)
=\(\dfrac{9}{8}:\dfrac{3}{5}\)
=\(\dfrac{9}{8}.\dfrac{5}{3}=\dfrac{45}{24}=\dfrac{15}{8}\)
b.
B=\(\dfrac{3}{4}:\left(\dfrac{2}{5}:\dfrac{3}{5}\right)\)
=\(\dfrac{3}{4}:\left(\dfrac{2}{5}.\dfrac{5}{3}\right)\)
=\(\dfrac{3}{4}:\dfrac{2}{3}=\dfrac{3}{4}.\dfrac{3}{2}\)
=\(\dfrac{9}{8}\)
c.
C=\(\left(\dfrac{11}{12}:\dfrac{33}{16}\right).\dfrac{3}{5}\)
=\(\left(\dfrac{11}{12}.\dfrac{16}{33}\right).\dfrac{3}{5}\)
=\(\dfrac{4}{9}.\dfrac{3}{5}=\dfrac{12}{45}\)
=\(\dfrac{4}{15}\)
a, \(A=\left(\dfrac{3}{4}:\dfrac{2}{3}\right):\dfrac{3}{5}\)
\(\Rightarrow A=\dfrac{9}{8}:\dfrac{3}{5}\)
\(\Rightarrow A=\dfrac{15}{8}\)
b, \(B=\dfrac{3}{4}:\left(\dfrac{2}{5}:\dfrac{3}{5}\right)\)
\(\Rightarrow B=\dfrac{3}{4}:\dfrac{2}{3}\)
\(\Rightarrow B=\dfrac{9}{8}\)
c, \(C=\left(\dfrac{11}{12}:\dfrac{33}{16}\right).\dfrac{3}{5}\)
\(\Rightarrow C=\dfrac{4}{9}.\dfrac{3}{5}\)
\(\Rightarrow C=\dfrac{4}{15}\)
a. A = (3/4.3/2).5/3
= (3/4.5/3).3/2
= 5/4.3/2
=15/8
mk làm lại câu b nha:
b. B= 3/4:(2/5.5/3)
=3/4:2/3 = 9/8
