Ответ:
Пошаговое объяснение:
1)
-5. 4/9 - (-13) = -5. 4/9 + 13 = -5. 4/9 +
12. 9/9 = 7. 5/9
2)
-19. 1/2 + 21 = -19. 1/2 + 20. 2/2 = 1. 1/2
3)
6. 4/5 * 15/17 = 34/5 * 15/17 = 2/1 * 3/1 = 6/1 = 6
4)
5/7 : (-10. 5/49) = 5/7 : (-495/49) =
5/7 * (-49/495) = 1/1 * (-7/99) = -7/99
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Answers & Comments
Ответ:
Пошаговое объяснение:
1)
-5. 4/9 - (-13) = -5. 4/9 + 13 = -5. 4/9 +
12. 9/9 = 7. 5/9
2)
-19. 1/2 + 21 = -19. 1/2 + 20. 2/2 = 1. 1/2
3)
6. 4/5 * 15/17 = 34/5 * 15/17 = 2/1 * 3/1 = 6/1 = 6
4)
5/7 : (-10. 5/49) = 5/7 : (-495/49) =
5/7 * (-49/495) = 1/1 * (-7/99) = -7/99