Ответ:

1)3-1 5/9=3-14/9=27/9-14/9=13/9=1 4/9

2) 13/9÷7/15=13/9×15/7=13/3×5/7=65/21

3)187/15-13/9+5/9=3927/315-975/315+175/315=3127/315=

=9 292/315

Ответ:

Пошаговое объяснение:

1) 3 - 1. 5/9 = 2. 9/9 - 1. 5/9 = 1. 4/9

2) 1. 4/9 : 7/15 = 13/9 : 7/15 = 13/9 * 15/7 = 13/3 * 5/7 = 65/21 = 3. 2/21

3) 12. 7/15 - 3. 2/21 =

12. 49/105 - 3. 10/105 =

9. 39/105 = 9. 13/35

4) 9. 13/35 + 5/9 =

9. 117/315 + 175/315 =

9. 292/315