Question

Please answer the question .

Answer 1

Step-by-step explanation:

1)5/7×4/3+6/5×5/7

=5/7(4/3+6/5)

=5/7(20+18/15)

=5/7×38/15

=38/21

2)4/11×-2/5+7/22×-2/5

= -2/5(4/11+7/22)

= -2/5(8+7/22)

= -2/5×15/22

= -3/11

3)3/8×9/15-5/3×3/8

=3/8(9/15-5/3)

=3/8(9-25/15)

=3/8×-16/15

-2/5

4)14/13×-4/5+-4/5×12/13

= -4/5(14/13+12/13)

= -4/5(14+12/13)

= -4/5×26/13

= -8/5