Question

помогите матем пж N1080

Answer 1

8 9/20 * 2/13 = 169/20 * 2/13 = 13/10 * 1/1 = 13/10 = 1 3/10 = 1,3

5 1/3 * 3/8 = 16/3 * 3/8 = 16/8 = 2

10 1/2 * 2/7 = 21/2 * 2/7 = 21/7 = 3

5/6 * 1 6/5 = 5/6 * 11/5 = 11/6 = 1 5/6

3 1/9 * 3/8 = 28/9 * 3/8 = 7/3 * 1/2 = 7/6

9 1/7 * 3/4 = 64/7 * 3/4 = 16/7 * 3/1 =48/7 = 6 6/7

10 1/5 * 10/17 = 51/5 * 10/17 = 3/1 * 2/1 = 6

3/11 * 5 1/2 = 3/11 * 11/2 = 3/2 = 1 1/2 = 1,5

Answer 2

сокращают крест на крест, я же показала далее сокращеные уже дроби

Answer 3

спасибо