Ответ:
29 : 2 целых 6/17
30 : 2/7
31 : 6 целых 5/12
32 : 4 целых 13/16
Пошаговое объяснение:
№29
(7/6 - 1/12 + 1/36)* 72/34= ( 42/36 - 3/36 + 1/36) = 40/36 * 72/34 = 80/34 = = = 40/17 = 2 6/17
№30
(8/7 - 1/14 + 1/42) *12/46 = (48/42 - 3/42 + 1/42) * 12/46 = 46/42 * 12/46 = 2/7
№31
2 4/9 : ( 2/3 - 2/7) = 22/9 : (14/21 - 6/21) = 22/9 * 21/8 = 231/36 = 6 5/12
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Ответ:
29 : 2 целых 6/17
30 : 2/7
31 : 6 целых 5/12
32 : 4 целых 13/16
Ответ:
Пошаговое объяснение:
№29
(7/6 - 1/12 + 1/36)* 72/34= ( 42/36 - 3/36 + 1/36) = 40/36 * 72/34 = 80/34 = = = 40/17 = 2 6/17
№30
(8/7 - 1/14 + 1/42) *12/46 = (48/42 - 3/42 + 1/42) * 12/46 = 46/42 * 12/46 = 2/7
№31
2 4/9 : ( 2/3 - 2/7) = 22/9 : (14/21 - 6/21) = 22/9 * 21/8 = 231/36 = 6 5/12