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1、1,乘法运算定律的复习,天门市第一小学,李老师,8125=,1000,425=,100,258=,200,872(1022)=,87200,4925=,900,125638=,63000,1625=,400,(1055)4=,400,3520,=700,1258425=,100000,365=,180,805=,400,(4+40)25=,1100,3,47502=,4700,12568=,6000,125=,60,4(120-20)=,400,425=,210,4352=,430,125425890=,0,4,125578,=125857,=100057,=57000,1225,=3425,
2、=3(425),=300,7524,=25346,=(254)(36),=10018,=1800,138254,=138(254),=138100,=13800,5,(13125)(38),=(1258)(133),=100039,=39000,2532125,=2548125,=(254)(8125),=1001000,=100000,6,136+13639,=1361+13639 =136(1+39) =13640 =5440,(80+8)125,=80125+8125,=10000+1000,=11000,7,36205,=36(200+5),=36200+365,=7200+180,=7380,9917,=(100-1)17,=10017-117,=1700-17,=1683,
