Ответы
Ответ:
Пошаговое объяснение:
1 . a) 8 2/13 - x = 5 7/13 ; б) y - 4 8/9 = 1 5/9 ;
x = 8 2/13 - 5 7/13 y = 1 5/9 + 4 8/9 ;
x = 2 8/13 ; y = 5 13/9 = 6 4/9;
в) ( a + 3 4/11 ) - 5 7/11 = 2 6/11 ; Приклади г), д), е) так само .
a + 3 4/11 = 2 6/11 + 5 7/11 ;
a + 3 4/11 = 8 2/11 ;
a = 8 2/11 - 3 4/11 ;
a = 4 9/11 .
2 . a) 5 7/15 - 2 3/15 - 13/15 = 3 4/15 - 13/15 = 2 6/15 = 2 2/5 ;
б) 9 1/7 - ( 3 4/7 + 2 6/7 ) = 9 1/7 - 6 3/7 = 8 8/7 - 6 3/7 = 2 5/7 ;
в) ( 7 - 3 3/10 ) + 2 9/10 = 3 7/10 + 2 9/10 = 5 16/10 = 6 6/10 = 6 3/5 .
3 . a) 5 1/3 + 2 = 7 1/3 ;
б) 2 5/8 + 2 7/8 = 4 12/8 = 5 4/8 = 5 1/2 ;
в) 3 2/9 + 5 5/9 = 8 7/9 ;
г) 10 - 4 3/10 = 9 10/10 - 4 3/10 = 5 7/10 ;
д) 8 8/11 - 5/11 = 8 3/11 ;
е) 6 2/7 - 3 6/7 = 5 9/7 - 3 6/7 = 2 3/7 .