Question

решите пожалуйста по матиматике даю 35 баллов

Answer 1

Ответ:

Пошаговое объяснение:

1)  3 1/8 + 9 1/12 -6 5/6 =>  НОК(8;12;6) = 24 => 3 3/24 +9 2/24 - 6 20/24 =

= (3+9-6) (3+2-20)/24 = 6 (5-20)/24 = 5 (24+5-20)/24 = 5 9/24 = 5 3/8.

2)  5 3/5 + 4 11/15 - 8 1/12 => НОК(5;15;12) = 60 =>

5 36/60+4 44/60 - 8 5/60  = (5+4-8)  (36+44-5)/60 = 1 75/60 = 2 15/60 =

= 2 1/4 = 2.25.

3)  3 9/10 - 1 5/12 -1 11/24 => НОК(10;12;24) = 120 =>

3 9*12/10*12 - 1 5*10/12*10 - 1 11*5/24*5 = 3 108/120 - 1 50/120 - 1 55/120 =

= (3-1-1) (108-50-55)/120 = 1   3/120 = 1 1/40.

4)  13 5/6 - 8 1/4 - 5 1/3 => НОК(6;4;3) =12 => 13 10/12 - 8 3/12 - 5 4/12 =

= (13-8-5) (10-3-4)/12 = 3/12 = 1/4 = 0,25.