a) 20.16+20.35+20.49
=20.(16+35+49)
=20.100=2000
b) 5.(|-13|-500)+|-2017|
=5.(13-500)+2017
=5.(13-1)+2017
=5.12+2017
=60+2017=2077
c) (24.22-32.7)2017
=(16.4-9.7)2017
=(64-63)2017
=12017=1
d) 160:{180-[36-(22.16-22.12)]}
= 160:{180-[36-(4.16-4.12)]}
=160:{180-[36-4(16-12)]}
=
160:{180-[36-4.4]}
=
160:{180-[36-16
]}
=160:
{180-20
}
=160:160=1