问题
解答题
某同学把250元钱存入银行，整存整取，存期为半年。半年后共得本息和252.7元，求银行半年期的年利率是多少？（不计利息税）
答案
2.16%
等量关系：本息和＝本金×（1＋利率）
设半年期的实际利率为X，
250（1＋X）＝252.7
X＝0.0108
所以年利率为0.0108×2＝0.0216
答：银行的年利率是2.16%
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某同学把250元钱存入银行，整存整取，存期为半年。半年后共得本息和252.7元，求银行半年期的年利率是多少？（不计利息税）
2.16%
等量关系：本息和＝本金×（1＋利率）
设半年期的实际利率为X，
250（1＋X）＝252.7
X＝0.0108
所以年利率为0.0108×2＝0.0216
答：银行的年利率是2.16%
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