Question

срочно помогите ауууу​

Answer 1

Ответ:

79/80 - (3/16 + 39/40) = (79/80 - (39/80) - 3/16 = 40/80 - 3/16 = 1/2 - 3/16 = 5/15

2/45 + (41/45 - 7/9) = ( 2/45 + 41/45) - 7/9 = 43/45 - 7/9 = 43/45 -35/45 = 8/45

7/15 - (2/15 + 1/5)=(7/15-2/15)-1/5=5/15-1/5 = 5/15 - 3/15 = 2/15

3/16 + (15/16 - 5/8) = (3/16 + 15/16) - 5/8 = 18/16 - 5/8 = 18/16 - 5/8 = 9/8 - 5/8 = 4/8 = 1/2