Question

tính

a.3/5 - 1/15 x 10/13 

b 1/2 + 3/8 : 3/4 

c, (3/5- 3/20) x 4/5 

giúp em ạ~

Answer 1

a. 3/5 -1/5 x 10/13

    = 3/5 - 2/13

    = 29/65

b. 1/2 + 3/8 : 3/4

     = 1/2 + 1/2

     = 1

c. (3/5 - 3/20) x4/5

     = 9/20 x 4/5

     = 9/25

Answer 2

\(a,\frac{3}{5}-\frac{1}{15}x\frac{10}{13}\)

=3/5-2/39

=107/195

b,1/2+3/8:3/4

=1/2+1/2

=1

c,(3/5-3/20)x4/5

=9/20x4/5

=9/25