Question

Номер 509. Помогите срочно!
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Answer 1

Ответ:

Пошаговое объяснение:

1)  1/5 + 1/9 + 1/3 => НОК(5;9;3) =45=> 9/45 + 5/45 + 15/45 =

= (9+5+15)/45 = 29/45;

2)  1/2+3/5-2/3 =>  НОК(2;5;3) = 30=>  15/30 + 18/30-20/30 =

= (15+18-20)/30 = 13/30;

3)  5/6+3/8 -1/4 =>  НОК(6;8;4) = 24 =>  20/24+9/24-6/24 =

(20+9-6)/24 = 23/24;

4)  5/9+1/6+3/4 => НОК(9;6;4) = 36 =>  20/36+6/36+27/36 =

= (20+6+27)/36 = 53/36 = 1 17/36;

5)  1/3+4/9+5/6 => НОК(3;9;6) = 18 =>  6/18+8/18+15/18 =

= (6+8+15)/18 = 29/18 = 1 11/18;

6)  1/4+1/5-3/10 => НОК(4;5;10) = 20 =>5/20 + 4/20-6/20 =

= (5+4-6)/20 = 3/20.