Вычислите 3/5 + 1/153/16 + 5/87/9 - 13/187/9 - 2/3

Question

Вычислите
3/5 + 1/15
3/16 + 5/8
7/9 - 13/18
7/9 - 2/3

Answer 1

3/5 + 1/15 = 9/15 + 1/15 = 10/15 = 2/3.
3/16 + 5/8 = 3/16 + 10/16 = 13/16.
7/9 - 13/18 = 14/18 - 13/18.
7/9 - 2/3 = 7/9 - 6/9 = 1/9.

Answer 2

1) 2/3
2)13/16
3)1/18
4)1/9