Question

[hung phung]

    Tính :
a) 13/15 + 4/7 - 101/105        b) 2/5 + 3/5 + x 4/9        c) 3/4 x 5/2 x 7/6       
d) 1/2 : 1/4 - 2/9          e) 2/3 - 1/4 +2/9               g) 5/2 + 1/3 x 3/2

Answer 1

[Nguyễn Lê Phước Thịnh]

a: =91/105+60/105-101/105

=50/105=10/21

c: \(\dfrac{3}{4}\cdot\dfrac{5}{2}\cdot\dfrac{7}{6}=\dfrac{3}{6}\cdot\dfrac{7}{2}\cdot\dfrac{5}{4}=\dfrac{1}{2}\cdot\dfrac{7}{2}\cdot\dfrac{5}{4}=\dfrac{35}{16}\)

d: =2-2/9

=18/9-2/9

=16/9

e: =24/36-9/36+8/36

=23/36

g: =5/2+1/2

=3

Answer 2

[hung phung]

thanks