Question

Помогите мне,
ДАМ 30 БАЛЛОВ

Answer 1

3/12+ 25/30= 5x3/5x12 + 2x25/2x30= 15/60 +50/60= 15 + 50/60 = 65/60 = 13x5/12x5= 13/12 = 1 1/12

2)10/24 - 21/54= 9x10/9x24 + 4x21/4x54 = 90/216 + 84/216 = 90 + 84/216 = 174/216= 29x6/36x6= 29/36

/ --- это дробь