Question

2)
3)
4)
17-25 18-197-11 15 12
1
1
25
+
1
19
8 7
+
11
7
4
25
12
19,
2
11
2
12)*

Answer 1

Ответы примеров на фотке:

1) 17/25 - 9/25 + 4/25 = 17-9+4/25 = 12/25

2) 18/19 - (8/19 + 7/19) = 18/19 - 15/19 = 3/19

3) 7/11 - 1/11 - 2/11 = 7-3/11 = 4/11

4) 15/12 - (7/12 - 2/12) = 15/12 - 5/12 = 10/12, сократить = 5/6