Ответ:
а) 3/4 + 5/6 = 9/12 + 10/12 = 19/12 = 1 7/12.
б) 25/32 + 4/10 = 125/160 + 64/160 = 189/160 = 1 29/160.
в) 19/24 − 25/36 = 57/72 − 50/72 = 7/72.
г) 11/18 − 5/12 = 22/36 − 15/36 = 7/36.
д) 9 3/9 + 3 1/6 = 9 1/3 + 3 1/6 = 12 1/2.
е) 7 7/8 − 2 7/12 = 7 21/24 − 2 14/24 = 5 7/24.
