五年级小数竖式计算.docx

1、五年级小数竖式计算101.7 7 =243.2 成=16.8 T8 =15.624 =0.138 +15 =1.35 忌7 =0.416 T2 =3.64 -h52 =91.2T.8 =0.756 .18 =51.3 .27 =26 .13 =14.36 吃7q8.336.21.70.0332Wq1.25+1.22.41 ”.7q4.5X0.07=6.3 .09=2.5X3.6=19.8T.3=5 .25=0.76 -0.4=13.42 X4.73 =9.65 X8.12 =7.23 X1.2 =6.3 X12 =2.14X8.3 =4.9 X 1.12 =21.98 X2.31 =0.24

2、X28.37 =29.13 X3.14 =9.88 X 11.21 =5.5+11 =7.5.5 =16.90.13=1.55T.9=3.7X0.016=5.63 + 6.1 =0.30.15=0.5X0.12=0.6 X 3 姓.6X3=1.4 X 5=0.1 X 0.01 =0.35 X8=7.357=1 .01 =5.26+1.6 = 0.85 X6.3 = 52.6 X0.252= 35+73 =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1.02倍一定比原数大。 ()(3)因为 12 X35=420，所以 1.2X3.5=4

3、2.( )(4) 在表示近似数时，5.0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)0.25X9.9=0.25 X (10-1 ) =0.25 X 10-0.25。( )(7) 4.10与4.1大小相等，表示意义也相同。()(8)3.994精确到百分位约是 4.00.()(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0.9,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。9.36 X2.7=25272 0.89 X6.43=572275 P.25=0.760.4=2.

4、36 X0.22=2.8 X4.58=3.574.2=82.8 T6=45 X2.46=3.60.24=382.5 -M5=6.4 X 5.48=13.42 X4.73 =9.65X8.12 =7.23X 1.2 =6.3X 12 =2.14 X8.3 =4.9 X 1.12 =28 X32 =54 X25 =48 X 61 =23 X37=46 X58=326 X52=45 X12 =33 X12=32 X69=0.828 + 3697.2 + 247.65 + 0.8597.2 + 5.48.4 +2418 +4823 +1847.65 +250.98 +352.525 +2584 766

5、7.5+15230.4 部21.24 + 360.736 +2343.5+1235.21 +739.6 +246.21 +0.0385.44 +1642.84 +7101.7 F67.5+1551.3+ 0.2791.2 + 3.80.756 姓.180.66 + 0.311.97 +1.569.6+2.938.4+ 0.815 姓.060.828 + 3697.2 + 247.65 + 0.8512.6 + 0.288.4+ 2418 T823 +1847.65 +250.98 + 352.525 +25 84 76140.7 +382.8 + 721.56 +2.4=1.44 姓.015=

6、2.898 姓.18=85.44 +1621.24 +360.736 +2343.5 +1235.21 +739.6 +246.21 姓.0385.44 +1642.84 +7101.7 F67.5 +15230.4 %21.24 +360.756 姓.180.66 姓.311.97 +1.569.6 +2.938.4+ 0.815 姓.061.44 + 0.015=2.898 +0.18=1.44 + 0.015=2.898 姓.18=0.328 而=3.51 T=600 -h50=42 X0.16=84 X0.25=0.36 X0.9=2.4+3=20X0.5=0.8X6=1000 X0.

7、09=1.3527=58 X0.32=1.08 X52=8.5X0.54= 5.62X2.4=0.28 X0.16=1.06 X0.82=0.06X0.75= 0.41 X2.01 =0.63X0.12=3.5X2.011.26 .84=1.45X6.5+0.55 X6.5 6.12X99+6.125.9X 101-5.98+ ( ) =0.825.8+ ( ) =0.258 452 穴 )=45.2 70 穴 )=0.716.43+3.6= 21.5-20.83= 5.7+4.33= 20.1-6.9=0.65+19.5= 0.29X3.18 (保两) 4.48 忌.8+1.535.4-9.

8、6 + (2.65-1.05 ) 6.3 X【(0.9+1.8) +4.5】以下简便运算12.5X32 X0.25 29.4+1.72+3.56 5.17-1.8-3.20.312 X12=42X0.16= 84 X0.25= 58 X0.32=1.08X52=54 X0.47= 420 X3.5= 9.3 -100 X1000=2871 .33=50-16.66=6 X0.73=3.82 X0.45=3.1 X4.05=1、用竖式计算0.396 +1.2=0.522 .18=0.756 姓.36=7.54 .26=91.2 .024=7.15X 22=90.75 +3.3=6.4X 2.5=

9、4.48 X4.4=5.25X 15 =4.6 X 0.6=35.4 X 4.2=0.042 X0.54 =0.76 X 0.320.25 X0.046=0.45 X0.73=0.43 X0.28=2.52 X3.4=1.08 X25=0.12X 0.5X 0.16 =（保留两位小数）3.25 X9.04=（用除法验算）8.9X 0.05=3.08 X0.43= 1.5 X26.7= 5.22 +29=18.72 +3.6=2.5X 7.1 X4 = 16.12X 99 + 16.12=5.2X 0.9+ 0.9=7.28 X99+7.28= 4.3 X50 X0.2=2.7X 5.4X 3.

10、9=3.6X9.85-5.6 = 8.05 X3.4+7.6 =6.58 X 4.5 X 0.9=2.8 X0.5+1.58= 4.85 + 0.35 + 1.4=8.7 X 17.4 - 8.7X 7.4= (1.25 - 0.125) X8=32 + 4.9-0.9=4.8-4.8 X 0.5 = 4.8X 100.1 =9.5X 101 =0.68 + (5.2 -3.5 ) X 1.25=40.5 + 0.81 X 0.18=4.8 X (15 + 2.4)6.81+6.81 X 99=0.25 X185 X40=4.4X 0.8-3.4X 0.8=(9.37+9 . 37+9 . 3

11、7+937) X 2. 5=4. 2.X 1. + 1.X 1.75=2.37 X6.3+2.37 X3.7=2.5 X1.25 X0.32=46 X0.33+54 X0.33=6.81+6.81 X99 = 0.25 X185 X40=(8 X5.27) X 1.25 =6.8X0.75 姓.5 =1.53+23.4 +7.2=3.75-0.125 2 75=13.5X 0.98=12.5X 8.8 =9.5 X 99=1.2X1.4 =0.37X 8.4 =3.14 X2.8=0.15X 2.34 =0.85 X 1.12 =0.86 X5.4=40+14 =45.5+38 =7.2+2.

12、1 =3.87 7= 146.4 +13 =0.382 X0.13 =5.634.1 =2.84 X0.03=26.37 T1 =32 -M2 =2.84X0.03 =4.8 忌3=0.382 X0.13 =4.2F5 =26.55 十59=117 +18=9.48+ 1.36=36.9 +18=四、单位换算(12%0.24 米=( )厘米0.09吨=( )千克8.54平方分米=()平方厘米 3.64 =()米140平方厘米:=()平方分米 785米-()千米23分米=()米60克=()千克2.06千克=()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

13、便方法计算)( 24%13.75 - (6.48 + 3.75)15.89 + (6.75-5.89) 5.17 - 1.8-3.22、脱式计算（能简算的要简算）0.125 X0.25X8 X42、脱式计算（能简算的要简算）0.125 X320.78X 1013.26 X5.7 32.6 X0.070.25 X 0.060.125 X0.40.64 X 0.7514.5 X 0.2810.32 +212.8+437.8 + 910.32 +2.465 + 5211.2 + 0.059+ 0.181.8+207 + 0.567.3+ 0.250.798 姓.389.8 +1.42.52+2.46

14、0 T.872.8 + 0.80.315 +1.531 +2513+200.092 +2372.8 +80.315 姓.1596 + 64176 +2511.4 + 0.2408 +2636 T896 姓.647.56+4.21.2X 1.4=0.37 X8.4 =3.14X 2.8=0.85X 1.120.86 X 5.4=0.15X 2.34 =40 +14 =26.37 +3145.5 +38 =1560 +35 =4.8+2.3 =1.55 + 3.9=2.1.64 + 2.35=8.65-6.31 =28.448 +14=10.88 +34=0.58 X250=12.5 + 3.6=

15、10 - 7.64=1.86 X 7=13.88 - 6.29=926 X0.15=8 700=100.2 - 2.2826.3+ 7.93=23 X7.06=44 F （精确到百分位）18 +24=43.68 +26=25.3 +0.88=124.8 .24=0.1575 +3.15=0.612 +1.8=16.787 姓.28（保留一位小数）2.36 X 0.222.8 X 4.583.57+4.245 X2.469.62-0.158 （得数保留两位小数）14.2+11 （商用循环小数表示）203.5 +11 =25.24=34.5 +15=5.6*1.8+12=1.8+12=7.83 样4.088=0.54 布=6.3+14=72 +15=14.21 么24 +15=1.26+18=43.5 +29=18.9 切=1.35+15=328 +16=1.35 T7=7.65 姓.85=12.6 .28=62.心.6=0.544 .16=1.44+1.8=11.7-2.6=19.4+12=5.98 姓.23=19.76 十5.2=10.8 -M.5=21 +1.4=8.84 +1.7=6.21 .03=1.890.54=2.1 姓.4=2.56 T.2=50.18 T8.6=4.68 以5=