Question

tính giá trị biểu thức

2/5 x 1/2 : 1/3

1/2 x 1/3 + 1/4

giúp mình nha

giải chi tiết mình sẽ tick

 

Answer 1

2/5 x 1/2 : 1/3 = 2/5 x 1/2 x 3 = 3/5

1/2 x 1/3 + 1/4= 1/6 + 1/4 = 4/24 + 6/24 = 10/24 =5/12

Answer 2

\(\dfrac{2}{5}\times\dfrac{1}{2}:\dfrac{1}{3}=\dfrac{2}{5}\times\dfrac{3}{2}=\dfrac{3}{5}\)

\(\dfrac{1}{2}\times\dfrac{1}{3}+\dfrac{1}{4}=\dfrac{1}{6}+\dfrac{1}{4}=\dfrac{2}{12}+\dfrac{3}{12}=\dfrac{5}{12}\)

Answer 3

2/5 x 1/2 : 1/3

= 1/5 : 1/3 

= 3/5

1/2 x 1/3 + 1/4

= 1/6 + 1/4

= 5/12

Answer 4

=1/5:1/3

=1/5x3/1

=3/5

=1/6+1/4

=4/24+6/24

=10/24

=5/12

Answer 5

\(\dfrac{2}{5}\times\dfrac{1}{2}:\dfrac{1}{3}=\dfrac{2}{5}\times\dfrac{1}{2}\times\dfrac{3}{1}=\dfrac{1}{5}\times\dfrac{1}{1}\times\dfrac{3}{1}=\dfrac{3}{5}\\ \dfrac{1}{2}\times\dfrac{1}{3}+\dfrac{1}{4}=\dfrac{1}{6}+\dfrac{1}{4}=\dfrac{4}{24}+\dfrac{6}{24}=\dfrac{10}{24}=\dfrac{5}{12}\)