Question

Помогите пожалуйста и объясните если сможете

Answer 1

1) 79/80 - (3/16 + 39/80) = 79/80 - (15/80 + 39/80) = 25/80 = 5/16;
2) 2/45 + (41/45 - 7/9) = 2/45 + (41/45 - 35/45) = 9/45 = 1/5;
3) 7/15 - (2/15 + 1/5) = 7/15 - (2/15 + 3/15) = 2/15;
4) 3/16 + (15/16 - 5/8) = 3/16+ (15/16 - 10/16) = 8/16 = 1/2.