递等是计算,能简便运算的简便 (2.56+7.5)+(6.44+2.5)
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![递等是计算,能简便运算的简便 (2.56+7.5)+(6.44+2.5)](/uploads/image/z/143048-56-8.jpg?t=%E9%80%92%E7%AD%89%E6%98%AF%E8%AE%A1%E7%AE%97%2C%E8%83%BD%E7%AE%80%E4%BE%BF%E8%BF%90%E7%AE%97%E7%9A%84%E7%AE%80%E4%BE%BF+%282.56%2B7.5%29%2B%286.44%2B2.5%29)
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递等是计算,能简便运算的简便 (2.56+7.5)+(6.44+2.5)
递等是计算,能简便运算的简便 (2.56+7.5)+(6.44+2.5)
递等是计算,能简便运算的简便 (2.56+7.5)+(6.44+2.5)
(2.56+7.5)+(6.44+2.5)
=(2.56+6.44)+(7.5+2.5)
=9+10
=19
太简单了吧……