资源描述
单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,乘法分配律(二),在 里填上合适的数,在 里填上运算符号。,(64+36),8=,64,8+36,8=,(,),想一想,判断,(,1,),35+652=,(,35+65,),2,(,2,),4 ( 25 + 6 ) = 4 25 + 6,(,3,),( 20 - 3 ) 25 = 20 25 - 20 3,(,4,),4 ,(,25 11,),= 4 25 + 411,125 (83)=,根据交换律、结合律进行口算,4 9 25=,16+,(,48+84,),=,36+42+58=,12 25=,3000,900,148,136,300,夹克衫,短袖衫,裤子,32,元,45,元,65,元,买,102,件短袖衫,.,一共要付多少元,?,26,99,=2574,=,26,100,-,26,1,=,26,100,1,-,( ),=,2600,-,26,想,想,做,做,43,201,=8643,=,43,200,+,43,1,=,43,200,1,+,),=,8600,+,43,(,102,35,=3570,=,100,35,+,2,35,=,35,100,2,+,),=,3500,+,70,(,想,想,做,做,想,想,做,做,46,12+54,12,12,=,46,54,+,),(,=,100,12,=,1200,5,23+5,37,用简便方法计算。,14112-14112,运用乘法分配律进行口算:,(,1,),10112-10012=,(,2,),5125+3125=,(,3,)(,4+4,),25=,(,4,),1249-249=,(,5,),5,11+8,11-3,11=,12,100,200,490,110,测一测:,103 32,99 32,1,2,1528+1488,3,
展开阅读全文