六年级(下)数学应用题 纳税和利息问题

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判断题:1.所有利息都要纳税。( ) 2.利息=税后利息。( ) 应用题:1.王芳的妈妈3年前买的某种金融债券,其年利率是2.89%,到期时共得本金和利息54335元。3年前,王芳的妈妈买了多少元的金融债券? 2.陈大娘在1999年5月1日那天把1000元存入了银行,到2002年5月1日取出时本金和税后利息共1064.8元,该储种的年率利是多少?(当时利息税按利息的20%缴纳)
快啊,能做多少算多少,在线等20多分钟,全做并正确,加分 ,注意要算式

1.所有利息都要纳税。(错)
2.利息=税后利息。(错 )

应用题:1.
王芳的妈妈买了多少元的金融债券:本金为x

x*(1+2.89%*3)=54335

x=54335/(1+2.89%*3)=50000

2\该储种的年率利是

1064.8=1000+1000*x*(1-20%)

x=8。1%

1错2错
王芳的妈妈买了多少元的金融债券:本金为x

x*(1+2.89%*3)=54335

x=54335/(1+2.89%*3)=50000

2\该储种的年率利是

1064.8=1000+1000*x*(1-20%)

x=8。1%

Zhenjiang Zhongshan Road Primary School Profile
History
In 1950, the creation of cadres and their children in southern Jiangsu Zhenjiang Area School (scheduled to present name in 1954);
In 1960, becoming the approval of Jiangsu Provincial Party School of the teaching reform;
In 1978 and became the focus of primary schools in Jiangsu Province;
In 1980, by the Jiangsu provincial government awards;
Since 1991, won three consecutive provincial title of exemplary schools (only three times the commentary), the eighth consecutive prov