Question

tính giá trị biểu thức:

   1/2 : 2/3 + 4/7 =

0,45 + 0,23 x 0,5

Answer 1

 1/2 : 2/3 + 4/7 

= 0,75+ 4/7 

= 1,32142857143

0,45 + 0,23 x 0,5 

= 0,45 + 0,115

= 0,565

Answer 2

\(\dfrac{1}{2}:\dfrac{2}{3}+\dfrac{4}{7}=\dfrac{1}{2}\times\dfrac{3}{2}+\dfrac{4}{7}=\dfrac{3}{4}+\dfrac{4}{7}=\dfrac{37}{28}\)

\(0,45+0,23\times0,5=0,45+0,115=0,565\)

Answer 3

`1/2:2/3+4/7=3/4+4/7=21/28+16/28=37/28`

`0,45+0,23xx0,5=0,45+0,115=0,565`