1)=0.2+1 4/5×(4/9-3/2+1/6)=
=0.2+9/5(8/18-27/18+3/18)=
=0.2+9/5(-16/18)=0.2-16/10=0.2-8/5=
=0.2-1.6=-1.4
2)(2х-64)/6=-28+20
(2х-64)/6=-8
2х-64=-48
2х=-48+64
2х=16
х=16÷2
х=8
4)
(х-33)/11=(х-70)/22
(х-33)=(х-70)/2
2(х-33)=х-70
2х-66=х-70
2х-х=-70+66
х=-4
3) буду по действиям
5/11×2 1/5=5/11×11/5=1
1×0.006=0.006
1 1/8×8/9=9/8×8/9=1
1×0.004=0.004
0.006+0.004=0.01
0.5×0.0009+0.0001×0.5=
=0.5(0.0009+0.0001)=0.5×0.001=0.0005
0.01÷0.0005=20
ответ 20