四年级下册数学同步练习-6单元5课时 用乘法运算律进行简便运算-苏教版解析
http://t.cn/Ri466E4【精品】第6单元第5课时乘法运算定律进行简便计算（练习及解析）苏教版-四年级数学下册(1)25+563+75=(25+75)+563这里运用了()律和()律。【答案】加法结合；加法交换(2)对125×16简便计算时，可以写成125×( )×( )。【解析】对125×16简便计算时，可以写成125×8×2，因为125×8=1000，可以凑整。【答案】8 2(3)在乘法算式中，一个因数不变，另一个因数扩大10倍，积( )。【解析】在乘法算式中，一个因数不变，另一个因数扩大10倍，积同时扩大10倍。【答案】扩大10倍(4)两个数相乘的积是3600，若一...
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