(1)到期时一次支付的款项数额=500×(F/P,6%,4)=500×1.2625=631.25(万元)支付的利息总额=631.25-500=131.25(万元)(2)每年的还本付息额=631.25/(F/A,6%,4)=631.25/4.3746=144.30(万元)或:每年的还本付息额=500/(P/A,6%,4)=500/3.4651=144.30(万元)⑶ 单位:万元

(1)到期时一次支付的款项数额=500×(F/P,6%,4)=500×1.2625=631.25(万元)支付的利息总额=631.25-500=131.25(万元)(2)每年的还本付息额=631.25/(F/A,6%,4)=631.25/4.3746=144.30(万元)或:每年的还本付息额=500/(P/A,6%,4)=500/3.4651=144.30(万元)⑶ 单位:万元