Question

tính bằng cách thuận tiện 

\(\dfrac{17}{11}\)+ (\(\dfrac{7}{15}\)+\(\dfrac{5}{11}\))

Answer 1

\(\dfrac{17}{11}+\left(\dfrac{7}{15}+\dfrac{5}{11}\right)\)

` = 17/11 + 7/15 + 5/11`

` = ( 17/11 + 5/11) + 7/15`

` = 22/11 + 7/15`

` = 2 + 7/15`

` = 37/15`

Answer 2

=17/11+5/11+7/15

=2+7/15=37/15

Answer 3

17/11+[7/15+5/11]

=[17/11+5/11]+7/15

=2+7/15

=17/5

Answer 4

`=17/11+5/11+7/15`

`=22/11+7/15`

`=30/15+7/15`

=`37/15`

Answer 5

(17/11 + 5/11) + 7/15

         2             + 7/15

                  37/15

Answer 6

37/15

Answer 7

17/11+(7/15+5/11)

=(17/11+5/11)+7/15

=2+7/15

=37/5