2) (3 4/5 × (-4 5/19)) : (-3)

3) - 25,6×(6 1/6)

-16× 7 2/5

4) - 27 × 2 2/9

-5 4/9 × 27/49​

Пошаговое объяснение:

2) 3 4/5*(-4 5/19)=19/5*(-81/19)=-81/5

-81/5:(-3)=-81/5*(-1/3)=27/5=5 2/5

3) - 25,6*(-6 1/6)=-25 3/5*(-6 1/6)=

-128/5*(-37/6)=2368/15

-16*7 2/5=-16*37/5=-592/5

2368/15:(-592/5)=2368/15*(-5/592)=

-4/3=-1 1/3

4) - 27*2 2/9=-27*20/9=-60

-5 4/9*27/49=-49/9*27/49=-3

-60:(-3)=20