Буду писать сразу неправильные дроби и решение:
а) 72/11 * 3/4 : 12/5 * 11/5 = 4,5
1) 72/11 * 3/4 = 4 целых 10/11
2) 54/11 : 5/12 = 45/22 = 2 целых 1/22
3) 45/22 * 11/5 = 9/2 = 4,5
б) 9 : 25/4 * 5/2 : 3/5 = 6
1) 9/1 * 4/25 = 36/25 = 1 целая 11/25
2) 36/25 * 5/2 = 18/5 = 3 целых 3/5
3) 18/5 * 5/3 = 6
в) 28/3 : 7/8 * 9/16 : 14/27 = 11 целых 4/7
1) 28/3 * 8/7 = 34/3 = 11 целых 1/3
2) 34/3 * 9/16 = 12/2 = 6
3) 6/1 * 27/14 = 81/7 = 11 целых 4/7
г) 11/6 : 7/3 * 15/4 * 21/5 = 12 целых 3/8
1) 11/6 * 3/7 = 11/14
2) 11/14 * 15/4 = 165/56 = 2 целых 53/56
3) 165/56 * 21/5 = 99/8 = 12 целых 3/8
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Буду писать сразу неправильные дроби и решение:
а) 72/11 * 3/4 : 12/5 * 11/5 = 4,5
1) 72/11 * 3/4 = 4 целых 10/11
2) 54/11 : 5/12 = 45/22 = 2 целых 1/22
3) 45/22 * 11/5 = 9/2 = 4,5
б) 9 : 25/4 * 5/2 : 3/5 = 6
1) 9/1 * 4/25 = 36/25 = 1 целая 11/25
2) 36/25 * 5/2 = 18/5 = 3 целых 3/5
3) 18/5 * 5/3 = 6
в) 28/3 : 7/8 * 9/16 : 14/27 = 11 целых 4/7
1) 28/3 * 8/7 = 34/3 = 11 целых 1/3
2) 34/3 * 9/16 = 12/2 = 6
3) 6/1 * 27/14 = 81/7 = 11 целых 4/7
г) 11/6 : 7/3 * 15/4 * 21/5 = 12 целых 3/8
1) 11/6 * 3/7 = 11/14
2) 11/14 * 15/4 = 165/56 = 2 целых 53/56
3) 165/56 * 21/5 = 99/8 = 12 целых 3/8