乘法运算律练习题

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1、乘法运算律练习题模块一1、乘法结合律：用字母表示:                                           举例：125×7×8         如：2、乘法交换律：用字母表示:                                        举例：25×40                  如：模块二1、乘法分配律用字母表示                             举例12×105                         135×6＋65×6=                               ==      

2、                         ==                               ==                               =如65＋65×99                         32×25×125 =                                  ==                                  ==                                  ==                                  =2、（a－b）·c=        

3、        举例56×（20-3）            164×9-64×9            43×98 =                        =                       ==                        =                       ==                        =                       =乘法运算律练习题一、连线30×5=5×30         乘法交换律         (a×b)×c=a×(b×c)                              

4、         38×9+62×9                  =（38+62）×9        乘法结合律         2×9×5                                        =9×（2×5）104×25=100×25+4×25        乘法分配律       （125-25）×8                                      =125×8-25×8二、判断（1）（25＋11）×40=25×40＋11            （  ）（2）12×4×4×13=4×（12＋13）          （  ）（3

5、）120÷5÷4=120÷（5×4）              （  ）（4）78×101=78×100＋78                 （  ）（5）（40-4）×25=40×25＋4×25           （  ）三、计算（4＋40）×25       600÷25÷4       728×102           98×34  四、提高练习85×199＋85        156×63＋156×36＋156           48×25  五、能力拓展11×11×35＋11×11×65