Question

ex.19) [624:2+(13.025-1.375):5:5]+(5.040-1.350):3= ex:20) 36:9+3x[50+3x(400:8-98:2)]=

Answer 1

[624:2+(13 025-1 375):5:5]+(5 040-1 350):3=2 008 
=(312+11 650:5:5)+3 690:3=
=(312+2330:5)+1 230=
=(312+466)+1 230=
=778+1230=
=2 008

 36:9+3x[50+3x(400:8-98:2)]=163
=4+3x[50+3x(50-49)]=
=4+3x(50+3x1)=
=4+3x53=
=4+159=
=163