四年级下册数学同步练习-3单元3课时-积的变化规律-苏教版解析
http://t.cn/Ri466E4新苏教版小学数学四年级下册《积的变化规律》同步练习及参考答案一、填空1.一个数和25相乘的积是15000,如果这个数缩小100倍,积变成()。【考点】:整数乘法规律。【解析】:根据一个数和25相乘的积是15000,可以求出这个数是:15000÷25=600.如果这个数缩小100倍,600÷100=6,再乘25。由此可知答案。【答案】:150【总结】:本题主考查学生对于整数乘除法计算规律的知识掌握情况。2.李师傅平均每天加工360个零件,一个月工作22天。一个月加工()个零件。【考点】:整数的乘法和应用【解析】:360×22=7920(个)由此可知答案。【答...
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