№1

(-0,76-0,44):2 2/3

1)-0,76-0,44=-1,2

2)-1,2:2 2/3=-1,2:8/3=

=-6/5*3/8=-3/5*3/4=-9/20=-0,45

№2

(3 5/14-2 3/4)*(-3 5/17)

1)3 5/14-2 3/4= 47/14-11/4=17/28

2)17/28*(-3 5/17)=17/28*(-56/17)=-2

Пошаговое объяснение:

№1

1) -0,76 - 0,44 = -1,2

2) -1,2 : 2 2/3 = -12/10 : 8/3 = -12/10 * 3/8 = -3/10 * 3/2 = -9/20

№2

1) 3 5/14 - 2 3/4 = 3 10/28 - 2 21/28 = 2 38/28 - 2 21/28 = 17/28

2) 17/28 * (-3 5/17) = 17/28 * (-56/17) = 1/1 * (-2/1) = -2/1 = -2