2013年，李叔叔买了30000元定期五年的国家建设债券，年利率为3.14％，他想用利息买这台电脑，够吗？
直接写得数． 4÷40%=×= 20×5.5=（+）×4=﹣= 2.9+3.4= 0.1÷0.01= 6﹣﹣=÷3= 6×=÷= 1÷﹣÷1=
直接写出得数+=×= 1﹣20%﹣= 4×==+25%= 3﹣==
直接写得数．= 4﹣1.63======== 27×5%=%==
直接写得数+=﹣=×=×=×÷×=+=×0+3= 3+1.75=÷=（+）×=
直接写得数．+0.625= 24×=÷9= （+）×12= 12×25%=÷=
×
= 20×5.5=（
+
）×4=
﹣
= 2.9+3.4= 0.1÷0.01= 6﹣
﹣
=
÷3= 6×
=
÷
= 1÷
﹣
÷1=
+
=
×
= 1﹣20%﹣
= 4×
=
=
+25%= 3﹣
=
=
= 4﹣1.63=
=
=
=
=
=
=
= 27×5%=
%=
=
+
=
﹣
=
×
=
×
=
×
÷
=
=
×0+3= 3
+1.75=
÷
=（
+
）×
=
+0.625= 24×
=
÷9=
+
）×12= 12×25%=
÷
=
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