=6/ 13×7/29+6/ 13×22/29

=6/ 13×(7/29+22/29)

=6/ 13× 1

=6/ 13

1.6÷ 3/8 – 3/8 ÷6

= 1/6x(3/8-3/8)

= 1/6x0

=0

2.4/7 × 5/9 + 3/7 × 5/9

=(4/7+3/7)x5/9

= 1x5/9

=5/9

3.5/2 -( 3/2 + 4/5 )

=5/2-3/2-4/5

= 1-4/5

= 1/5

4.6 ×( 1/2 + 2/3 )

=6x 1/2+6x2/3

=3+4

=7

5.8 × 4/5 + 8 × 1 1/5

=8x(4/5+ 1 1/5)

=8x3

=24

6.3 1 × 5/6 – 5/6

=(3 1- 1)x5/6

=30x5/6

=25

7.4/5 × 25/ 16 + 2/3 × 3/4

=5/4+ 1/2

=5/4+2/4

=7/4

8. 10 1 × 1/5 – 1/5 × 2 1

=( 10 1-2 1)x 1/5

=80x 1/5

= 16

1.6÷ 3/8 – 3/8 ÷6

= 1/6x(3/8-3/8)

= 1/6x0

=0

2.4/7 × 5/9 + 3/7 × 5/9

=(4/7+3/7)x5/9

= 1x5/9

=5/9

3.5/2 -( 3/2 + 4/5 )

=5/2-3/2-4/5

= 1-4/5

= 1/5

4.6 ×( 1/2 + 2/3 )

=6x 1/2+6x2/3

=3+4

=7

Not that much, sorry!