为您找到与38乘99简便方法计算相关的共 263 个结果：
三下数学精选题型：计算题专项练习（含口算、估算、竖式计算和脱式计算）一、口算和估算1．直接写得数。25×40＝5×18＝41×20＝420÷7＝70×20＝26
三年级数学下册面积专项练习★面积九大类型计算方法总结★【题型一：长和宽(边长)扩大的问题】...................................
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