Ответ:

1.7 1/8 + 4= 11 1/8, 1-4/5= 1/5, 30 1/12-1/12=30, 9+1 3/7= 10 3/7, 2-1/7= 1 6/7, 6 1/3-6= 1/, 5+ 8/9= 5 8/9. 8 9/10-7=1 9/10, 4 5/9+0=4 5/9, 1/36+12= 12 1/36, 14 7/8-5/8=14 2/8, 1 9/10-0= 1 9/10

2. 5 3/8+ 6 1/16= 11 7/16

2 1/9 + 8 4/27= 11 7/27

1 3/5+ 4/25= 9 19/25

3. 5 7/20 кг

Пошаговое объяснение:

1/2+1 1/4+3/5= 3 10/20+ 1 5/20 +12/20= 4 27/20= 5 7/20 кг