Пошаговое объяснение:
1) - 2 3/4 - (- 4/7) = - 2 3/4 + 4/7= -2 (3*7)/(4*7) + (4*4)/(4*7)= - 2 21/28 +16/28=
-2 5/28
2) 3 9/6 - 4 11/24 = 4 3/6 - 4 11/24= 4 1/2 - 4 11/24 = 4 12/24- 4 11/24 = 1/24
3) - 4 11/12 - ( - 11/18 ) = - 4 11/12 + 11/18 = -4 (11*3)/(12*3) + (11*2)/(18*2)=
-4 33/36 + 22/36= -4 11/36
Пошаговое объяснение:
1) - 2 3/4 - (- 4/7) = - 2 3/4 + 4/7= -2 (3*7)/(4*7) + (4*4)/(4*7)= - 2 21/28 +16/28=
-2 5/28
2) 3 9/6 - 4 11/24 = 4 3/6 - 4 11/24= 4 1/2 - 4 11/24 = 4 12/24- 4 11/24 = 1/24
3) - 4 11/12 - ( - 11/18 ) = - 4 11/12 + 11/18 = -4 (11*3)/(12*3) + (11*2)/(18*2)=
-4 33/36 + 22/36= -4 11/36