Question

вычислите
1/2 + 4/5
3/4 + 5/9
2/3 - 1/4
5/6 - 3/4

Answer 1

1/2 + 4/5 = 5/10 + 8/10 = 13/10.
3/4 + 5/9 = 27/36 + 20/36 = 47/36 = 1 11/36.
2/3 - 1/4 = 8/12 - 3/12 = 5/12.
5/6 - 3/4 = 10/12 - 9/12 = 1/12.