1.
= 46(350+250)= 46*600=27600
2.
= 4300-(43*100+43)= 4300-4300+43=43
3.
=32(128+872)-1000*31=32*1000-1000*31=32000-31000=1000
4.
=359(728-628)+641*1000= 359*100+641*1000=35900+641000=676900
