1) 1= 83/83

1) 1 - 9/83 = 83-9/83 = 74/83

2) 1 - 63/83 = 83-63/83 = 20/83

3) 1 - 70/83 = 83-70/83 = 13/83

4) 74/83 - 20/83 = 74-20/83 = 54/83

5) 54/83 - 13/83 = 54-13/83 = 41/83

2) 1= 91/91

1) 1 - 87/91 = 91-87/91 = 4/91

2) 1 - 25/91 = 91-25/91 = 66/91

3) 1 - 80/91 = 91-80/91 = 11/91

4) 4/91 + 66/91 = 4+66/91 = 70/91

5) 70/91 - 11/91 = 70-11/91 = 59/91

3) 1= 71/71

1) 1 - 11/71 = 71-11/71 = 60/71

2) 1 - 50/71 = 71-50/71 = 21/71

3) 1 - 59/71 = 71-59/71 = 12/71

4) 60/71 - 21/71 = 60-21/71 = 39/71

5) 39/71 + 12/71 = 39+12/71 = 51/71

4) 1= 63/63

1) 1 - 19/63 = 63-19/63 = 44/63

2) 1 - 55/63 = 63-55/63 = 8/63

3) 1 - 61/63 = 63-61/63 = 2/63

4) 44/63 - 8/63 = 44-8/63 = 36/63

5) 36/63 - 2/63 = 36-2/63 = 34/63