-1. 2/9
Пошаговое объяснение:
1) 2/5 - 2/12 = 24/60 - 10/60 = 14/60 = 7/30
2) 3. 12/36 * 7/30 =
3. 1/3 * 7/30 = 10/3 * 7/30 = 1/3 * 7/3 = 7/9
3) 11 : 5. 1/2 = 11 : 11/2 = 11 * 2/11 = 22/11 = 2
4) 7/9 - 2 = 7/9 - 1. 9/9 =
-1. 2/9
Пошаговое объяснение:
1) 2/5 - 2/12 = 24/60 - 10/60 = 14/60 = 7/30
2) 3. 12/36 * 7/30 =
3. 1/3 * 7/30 = 10/3 * 7/30 = 1/3 * 7/3 = 7/9
3) 11 : 5. 1/2 = 11 : 11/2 = 11 * 2/11 = 22/11 = 2
4) 7/9 - 2 = 7/9 - 1. 9/9 =
-1. 2/9