Ответ:

Пошаговое объяснение:

2) (-2,5 - 1 5/6): 1 4/9- 3 5/9 * ( -2 1/4)=-11

1)- 2 5/10 -1 5/6= - 2 1/2 - 11/6 = -5/2- 11/6= (-5*3)/6-11/6=-26/6= -13/3

2) -13/3 : 1 4/9 = -13/3 : 13/9 = - 13/3 * 9/13=-3

3) 3 5/9 * (-2 1/4)= -32/9 * 9/4=-8

4) -3-8=-11

3) (-5/12-3/4):2 1/3+ 5 1/3*0,75= 3 1/2

1) - 5/12 - 3/4 = - 5/12 - (3*3)/12=-14/12=-7/6

2) -7/6 : 2 1/3 = -7/6 : 7/3 = -7/6 * 3/7 = -1/2

3) 5 1/3 * 0,75= 16/3 * 75/100= 16/3 *3/4= 4

4) -1/2 +4= 3 1/2

4) ( 3/4 - 1 7/8): 3/4 + 3 1/9 * 3/7=-1/6

1) 3/4 - 1 7/8 = 3/4 - 15/8 = (3*2)/8 - 15/8 = 6/8 - 15/8 =-9/8

2) -9/8 : 3/4 = -9/8 * 4/3 = -3/2

3) 3 1/9 * 3/7 = 28/9 * 3/7=4/3

4) -3/2 + 4/3 = (-3*3)/6 + (4*2)/6= -9/6 +8/6= -1/6