Пошаговое объяснение:
1. -2 + 1 7/8 = -1/8
2. -1 + 2 1/9 = 1 1/9
3. -4 + 3 1/2 = -1/2
4. -5/7 + 4/7 = -1/7
5. -5/8 + 7/8 = 2/8 или 1/4
6. -1/6 + 1 = 5/6
7. 5/12 - 1/12 = 4/12 или 1/3
8. 7/15 - 11/15 = -4/15
9. 5/16 - 1/16 = 4/16 или 1/4
10. -5/6 + 2/3 = -5/6 + 2*2/6 = -5/6 + 4/6 = -1/6
11. -3/4 + 4/5 = -3*5/20 + 4*4/20 = -15/20 + 16/20 = 1/20
12. -1/2 + 1/8 = -1*4/8 + 1/8 = -4/8 + 1/8 = -3/8
Пошаговое объяснение:
1. -2 + 1 7/8 = -1/8
2. -1 + 2 1/9 = 1 1/9
3. -4 + 3 1/2 = -1/2
4. -5/7 + 4/7 = -1/7
5. -5/8 + 7/8 = 2/8 или 1/4
6. -1/6 + 1 = 5/6
7. 5/12 - 1/12 = 4/12 или 1/3
8. 7/15 - 11/15 = -4/15
9. 5/16 - 1/16 = 4/16 или 1/4
10. -5/6 + 2/3 = -5/6 + 2*2/6 = -5/6 + 4/6 = -1/6
11. -3/4 + 4/5 = -3*5/20 + 4*4/20 = -15/20 + 16/20 = 1/20
12. -1/2 + 1/8 = -1*4/8 + 1/8 = -4/8 + 1/8 = -3/8