Question

36*19+245-123:3*2=. 459+51*32-21*3:9+6=. 990+10*35-42,:3*28=. 6*145+868:7:2+40-972=

Answer 1

36•19+245-123:3•2
=245-123:3•2
=648+245-82
=847

459+51•32-21•3:9+6
=459+1623-21•3:9+6
=459*1623-7+6
=2090

990+10•35-42:3•28
=990+350-42:3•28
=990+350-392
=948

6•145+868:7:2+40-972
=870+868:7:2+40-972
=870+63+40-972
=0