табындар: 3 12 (2) 24 (3) 30 54 28 3 22 30 10 75 6) 12 14 27 21 7) 3) 12 18 4 24 5 60 3 36​

Ответ:

Пошаговое объяснение:

1) 3/12 + 25/30= 1/4 + 5/6 => НОК(4;6) = 12 =>3/12 + 10/12 = 13/12= 1 1/12;

2)  10/24 - 21/54 =5/12 - 7/18 => НОК(12;18)=36 => 15/36 - 14/36 = 1/36;

3)  30/54 + 22/30 = 5/9 + 11/15 => НОК(9;15) = 45 => 25/45+33/45 =

=  58/45 = 1 13/45;

4)  28/40 - 10/75 = 7/10 - 2/15 => НОК(10;15) = 30 =>21/30 - 4/30 = 17/30;

5)  12/27 + 14/21 = 4/9 + 2/3 => НОК(9;3)=9=>4/9 + 6/9 = 10/9=1 1/9;

6)  14/24 - 15/40 = 7/12 - 3/8 =>  НОК(12;8) = 24=> 14/24 - 9/24=5/24;

7)  12/18 - 5/60 = 2/3 - 1/12 => НОК(3;12) = 12 =>8/12-1/12 = 7/12;

8)  4/24 + 3/36 = 1/6 + 1/12 => НОК(6;12) = 12 => 2/12+1/12 = 3/12 = 1/4.