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题型:计算题 题类:常考题 难易度:普通

西师大版数学四年级下学期 2.2 乘法运算律及简便运算(7)

简便计算。                                
(1)、(80+8)×125                                  
(2)、5×(6+40)                                     
(3)、45×17+55×17                                        
(4)、13×25+25×27                                          
(5)、8×(125-20)                                             
(6)、38×115-38×15                                                             
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