(40+8)X25 125X(8+80) 36X(100+50) =40X25+8X25 =125X8+125X80 =36X100+36X50 =1000+200 =1000+10000 =3600+1800 =1200 =11000 =5400 36X34+36X66 75X23+25X23 63X43+57X63 =36X(34+66) =23X(75+25) =63X(43+57) =36X100 =23X100 =63X100 =3600 =2300 =6300