(1)=6.25*(1+0.02)=6.25+0.125=6.375(2)=37.5*(4.8+5.2)=37.5*10=375(3)=52*(10-0.1)=52*10-52*0.1=520-5.2=514.8 (4)=8*0.125+8*1.25+8*12.5=1+10+100=1115同上(6)=5.86*(99+1)=5.86*100=586