Question

3/5+4/7+2/5+1/7+2/7

/ là phần

 

Answer 1

=(3/5|+2/5)+(4/7+1/7+2/7)

=1+1=2

Answer 2

Ta có:

3/5+4/7+2/5+1/7+2/7=(3/5+2/5)+(4/7+1/7+2/7)

                                    =        1       +          1          =    2

 

Answer 3

3/5+4/7+2/5+1/7+2/7

=(3/5+2/5)+(4/7+2/7+1/7)

=5/5+7/7

=1+1

=2

Answer 4

dung la bang 2

 

Answer 5

(3/5+2/5)+(4/7+1/7+2/7)

=5/5+7/7

=1+1

=2

 

Answer 6

\(\frac{3}{5}+\frac{4}{7}+\frac{2}{5}+\frac{1}{7}+\frac{2}{7}\)

= \(\left(\frac{3}{5}+\frac{2}{5}\right)\)+ \(\left(\frac{4}{7}+\frac{1}{7}+\frac{2}{7}\right)\)

= \(1+1\)

= \(2\)

Hay \(\frac{2}{1}\)

Answer 7

Là 2 nha bạn!

Answer 8

[3/5+2/5]+(4/7+2/7+1/7) =1+1=2

Answer 9

bang 2 .cho mk