1、五年级小数竖式计算4 16 15 18 9 64 28 2415 27 32 52 26210 25 126451025 15 3242 = = = = 5= = = = = 36= 45= = 45= = = = = 12 = = = = = = = 11 = = 6 = 8 = = 24 = 12 = = 12 = 21 = = = = = = = 33= 5= = 8= 7= 1= = = = = = = = 3573= 4、判断。(1)如果两个因数的积不是小数,那么这两个因数一定不是小数。( )(2)一个不等于0的数的倍一定比原数大。 ( )(3)因为1235=420,所以=42.(
2、)(4)在表示近似数时,也可以写成5。( )(5)整数乘法的交换律、结合律和分配律,对于小数乘法同样适用。( )(6)=(10-1)=。( )(7)与大小相等,表示意义也相同。( )(8)精确到百分位约是.( )(9)一个数(0除外)除以小数,商一定比这个数大。( )(10)两个数相除的商是,被除数不变,除数扩大10倍,商是9.( )5、把下列各式中的乘积点上小数点,使等式成立。 =25272 =57227 =103158 =8891= = = = 5= = = = = 36= 45= = 45= = = = = 12 = = = = = = = 92040= 78060= 96040= 79
3、97= 2832 5425 4861 2337= 4658= 32652= 4512 3312= 3269= 36 24 31 24 1848 23184 25 35 25 8456 3 8 72 = = = 16 7 9 15 6 36 23 12 7 24 16 7 9 15 6 36 23 12 7 24 210 15 36 24 31 24 1848 23184 25 35 25 8456 3 72 = = = 16 7 9 15 6 36 23 12 7 24 16 79 15 6 36 23 12 7 24 210 15 = = = = 8= 3= 7= 2325= 14= 28=
4、 60050= 42= 84= = 3= 20= 6= 1000= 27= 58= 52= = = = = = = = =+ 99+ 8( )= ( )= 452( )= 70( )=( )= 360( )= = =33= 10= = = = = = = 63= =+= += (保两) +() 【(+)】以下简便运算32 + () + (+)(+) + 42= 84= 58=52= 54= 420= 1001000=2871= = 6= = = = =1、用竖式计算= = 22= = = = = = = = 15= = = = = = = 25=(保留两位小数) = (用除法验算) = (用乘
5、法验算)= (保留三位小数)= (商用循环小数表示)= = = 29= 4 = 99= 99+= 50=64=2 624= =+= = = = = += += + = - = 8=32= = = 99= =8= += 213.0.8257= 101= ( ) = = (15 )= +99= 18540= = +937+937+937) 25= 42.1.1.= += = = =) 101= = 39+= 72= =46+54= +99= 18540=(8 = = += = = = 99= 4014 3831 156035 7 13 31 3242 23 = 55= = = = = 16=59=
6、 11718= = 18=四、单位换算(12%)米=( )厘米 吨=( )千克 平方分米=( )平方厘米 千米=( )米 140平方厘米=( )平方分米 785米=( )千米 23分米=( )米 60克=( )千克 千克=( )克 3元4角=( )元15厘米()米 7吨60千克=( )吨五、脱式计算(能简算的要用简便方法计算)(24%) () =2、脱式计算(能简算的要简算)。84+ =+(4) =2、脱式计算(能简算的要简算)32101 2 4 9 6552 9 20 7 60 3125 1320 23 8 9664 17625 26 3648 96 4014 31 38 156035 7 13 31 3242 23 = = 14= 34= 250= = 10= 7= 926= 8500= = 23= 449(精确到百分位)1824= 26= = = = = (保留一位小数) 4536 45 = = = (得数保留两位小数)(得数保留两位小数)11(商用循环小数表示)11=6= 15= 4= 12= 12= 9= 8= 6= 14= 7215= 7= 2415=18= 29= 27= 15= 11= 24= 52= 12= 32816= 27= = = = = = 12= = = = 21= = = = = = = = = = =
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