Ответ:
Пошаговое объяснение:
А.
1) 8/15 - 5/9 = 24/45 - 25/45 = -1/45
2) (2. 1/2)² * (-1/45) =
(5/2)² * (-1/45) = 25/4 * (-1/45) = 5/4 * (-1/9) = -5/36
Ответ: -5/36
Б.
1) 4. 13/18 - 3. 7/9 =
4. 13/18 - 3. 14/18 =
3. 31/28 - 3. 14/18 = 17/18
2) 1/2 - 4/17 = 17/34 - 8/34 = 9/34
3) 17/18 * 9/34 = 1/2 * 1/2 = 1/4
Ответ: 1/4
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Answers & Comments
Ответ:
Пошаговое объяснение:
А.
1) 8/15 - 5/9 = 24/45 - 25/45 = -1/45
2) (2. 1/2)² * (-1/45) =
(5/2)² * (-1/45) = 25/4 * (-1/45) = 5/4 * (-1/9) = -5/36
Ответ: -5/36
Б.
1) 4. 13/18 - 3. 7/9 =
4. 13/18 - 3. 14/18 =
3. 31/28 - 3. 14/18 = 17/18
2) 1/2 - 4/17 = 17/34 - 8/34 = 9/34
3) 17/18 * 9/34 = 1/2 * 1/2 = 1/4
Ответ: 1/4