Question

Tính:

a, 3/4 x 5/6=                                  b, 2/7 : 4/9=

Cho mình xin lời giải chi tiết ạ

 

Answer 1

5/8

3/4

Answer 2

\(a)\dfrac{3}{4}.\dfrac{5}{6}=\dfrac{5}{8}\)

\(b)\dfrac{2}{7}:\dfrac{4}{9}=\dfrac{9}{14}\)

Answer 3

\(\dfrac{3}{4}x\dfrac{5}{6}=\dfrac{3x5}{4x6}=\dfrac{15}{24}=\dfrac{5}{8}\)

b) \(\dfrac{2}{7}:\dfrac{4}{9}=\dfrac{2}{7}x\dfrac{9}{4}=\dfrac{18}{28}=\dfrac{9}{14}\)

Answer 4

\(a) \dfrac{3}{4}.\dfrac{5}{6}=\dfrac{1.5}{4.2}=\dfrac{5}{8}\)

\(b)\dfrac{2}{7}:\dfrac{4}{9}=\dfrac{2.9}{7.4}=\dfrac{9}{14}\)

Answer 5

a/=15/26=5/8

b/=2/7x9/4

=18/28=9/14

Answer 6

a) \(\dfrac{3}{4}\times\dfrac{5}{6}=\dfrac{3\times5}{4\times6}=\dfrac{15}{24}=\dfrac{5}{8}\)

b) \(\dfrac{2}{7}\div\dfrac{4}{9}=\dfrac{2}{7}\times\dfrac{9}{4}=\dfrac{18}{28}=\dfrac{9}{14}\)