(1)1*981+50*981+49*981=(1+50+49)*981=100*981=98100
(2)464+99-200=363
(3)537-543+163-57=700-600=100
(4)605*(268-208)=605*60=36300
(5)1983-400=1583
(6)53+2209=2262
(1)1*981+50*981+49*981=(1+50+49)*981=100*981=98100
(2)464+99-200=363
(3)537-543+163-57=700-600=100
(4)605*(268-208)=605*60=36300
(5)1983-400=1583
(6)53+2209=2262