Question

1.Tính bằng cách thuận tiện nhất :

(6/7 - 2/7) : 4/9 x 3 =

7/11 x 5/6 + 4/11 x 5/6 =

Answer 1

1,

a,=4/7:4/9.3

=9/7.3

=27/7

b,=(7/11+4/11).5/6

=1.5/6

=5/6

Answer 2

`(6/7-2/7):4/9xx3=4/7xx9/4xx3=[4xx9xx3]/[7xx4]=27/7`

`7/11xx5/6+4/11xx5/6=(7/11+4/11)xx5/6=11/11xx5/6=5/6`