简便算如下!数学的简便算!求简便算法、式!急急!第一题列递等式:5.2*49+4.9*48 =第二题列递等式[智力乐园]:15.37*6.88-9.37*6.88+15.37*3.12-9.37*3.12 =

来源:学生作业帮助网 编辑:作业帮 时间:2024/09/17 11:36:52
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