第一章:约分启蒙 班级( ) 姓名:( )一、2 的整除(1)能被 2 整除的数有哪些?是的下面打“” 3249712 32156 25653 42516 45470 14425 9698 9774 ( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )(2)约分(2 的约分)= = = =184041341682= = = =1402614186二、3 的整除(1)能被 3 整除的数有哪些?是的下面打“” 3451 2169 9981 443 1234 3566 32441 72777( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )(2)约分(3 的约分)= = = =41827672363= = = =5234511三、5 的整除(1)能被 5 整除的数有哪些?是的下面打“” 245 2160 2985 440 6234 3566 24001 8775( ) ( ) ( ) ( ) ( ) ( ) ( ) ( )= = = =401525660352015= = = =11452154、其他数的约分= = = =5813274935486= = = =32764123915、交叉约分 = = = 5415146243 = = = 1249542618361 = = =34536249254 = = =542612412074916