Question

Using commutativity and associavity of addition of rational numbers,express as a rational number ​​

Answer 1

Answer:

Correct option is

A

21

−17

7

3

+

9

−4

+

7

−11

+

9

7

=

7

3

+

7

−11

+

9

−4

+

9

7

=

7

3−11

+

9

−4+7

=

7

−8

+

9

3

=

7

−8

+

3

1

=

21

−8×3+1×7

=

21

−21+7

=

21

−17