101.7 7 = 243.2 成=16.8 T8 = 15.6^24 =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7Q8.33^6.2^ 1.7^0.03^ 32W Q1.25+1.2^2.41 ”.7Q 4.5X0.07= 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 X28.37=29.13 X3.14 = 9.88 X 11.21=5.5+11 = 7.5".5 =16.9^0.13= 1.55T.9= 3.7X0.016=5.63 +6.1=0.3^0.15= 0.5X0.12= 0.6 X 3姓.6X3= 1.4 X5=0.1 X 0.01 = 0.35X8=7.35^7= 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=42.( )(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= 0.76^0.4= 2.36 X0.22= 2.8 X4.58=3.57^4.2= 82.8 T6= 45 X2.46= 3.6^0.24= 382.5 -M5= 6.4 X5.48= 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 + 36 97.2 + 24 7.65 + 0.8597.2 + 5.4 8.4 +24 18 +48 23 +184 7.65 +25 0.98 +35 2.525 +25 84 7667.5+15 230.4 部21.24 + 36 0.736 +23 43.5+12 35.21 +7 39.6 +24 6.21 +0.03 85.44 +16 42.84 +7 101.7 F 67.5+1551.3+ 0.27 91.2 + 3.8 0.756 姓.18 0.66 + 0.311.97 +1.5 69.6+2.9 38.4+ 0.8 15 姓.06 0.828 + 36 97.2 + 24 7.65 + 0.85 12.6 + 0.288.4+ 24 18 T8 23 +184 7.65 +250.98 + 35 2.525 +25 84 76 140.7 +3 82.8 +721.56 +2.4= 1.44 姓.015= 2.898 姓.18= 85.44 +1621.24 +36 0.736 +23 43.5 +12 35.21 +7 39.6 +24 6.21 姓.03 85.44 +16 42.84 +7 101.7 F 67.5 +15 230.4 % 21.24 +360.756 姓.18 0.66 姓.3 11.97 +1.5 69.6 +2.9 38.4+ 0.8 15 姓.06 1.44 + 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 X0.09=1.35^27= 58 X0.32= 1.08 X52= 8.5X0.54= 5.62 X2.4= 0.28 X0.16= 1.06 X0.82= 0.06X0.75= 0.41 X2.01=0.63X0.12= 3.5X2.01 1.26 ".84=1.45X6.5+0.55 X6.5 6.12X99+6.12 5.9X 101-5.98+ ( ) =0.825.8+ ( ) =0.258 452 穴 )=45.2 70 穴 )=0.7800.9 -K )=80.09 360 -K )=0.36 6.54X1.04= 0.522 ".18=33 -^7.5= 10^0.8= 0.6^0.015= 0.532 ".4=16.43+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+1.535.4-9.6 + (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 5.17-1.8-3.20.312X12=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= 6X0.73=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=7.15X22=90.75 +3.3=6.4X 2.5= 4.48X4.4=5.25X 15 = 4.6 X0.6=35.4 X 4.2= 0.042 X0.54 = 0.76 X0.320.25X0.046=0.45X0.73= 0.43X0.28=2.52X3.4=1.08X25=0.12X 0.5X 0.16 = （保留两位小数）3.25X9.04=（用除法验算）8.9X3.08 X0.43= 1.5 X26.7= 5.22 +29= 0.05=2.5X 7.1 X4 = 16.12X 99 + 16.12= 18.72+3.6=5.2X 0.9+ 0.9= 7.28 X99+7.28= 4.3 X50X0.2=2.7X 5.4X3.6X9.85-5.6 = 8.05 X3.4+7.6 = 3.9=2.8 X0.5+1.58= 4.85 + 0.35 + 1.4=6.58 X 4.5 X0.9=8.7 X 17.4 - 8.7 X 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 X99= 0.25 X185 X40=4.4X 0.8-3.4X 0.8= (9.37+9 . 37+9 . 37+9 37) X 2. 5= 4. 2.X 1. + 1.X 1.75= 2.37 X6.3+2.37 X3.7= 2.5 X1.25X0.32=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=0.37X 8.4 = 3.14 X2.8=0.15X 2.34=3.75-0.125 2 75= 13.5X0.98= 12.5X 8.8=9.5 X99=46 X0.33+54 X0.33= 1.2X1.4 =0.85 X 1.120.86 X5.4= 40+14 = 45.5+38 = =7.2+2.1 = 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 X0.134.2F5 ==117 +18= 9.48+ 1.36= 36.9 +18= 26.55 十59=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(能简算的要用简便方法计算)( 24%3.68+ 7.56-2.68 7.85- (2.34-0.15) 35.6- 1.8- 15.6 - 7.215.89 + (6.75-5.89) 5.17 - 1.8-3.213.75 - (6.48 + 3.75)2、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）0.25 X 0.06 0.125X0.40.64 X0.7514.5 X0.280.125 X32 0.78X1013.26 X5.7 — 32.6X0.0710.32 +2 12.8+4 37.8 +910.32 +2.44.8X 0.9+0.48 (4-0.4) X2.5 0.544 ".025=65 + 52 11.2 + 0.05 9+ 0.18 1.8+207 + 0.56 7.3+ 0.25 0.798 姓.38 9.8 +1.42.52+2.4 60 T.8 72.8 + 0.8 0.315 +1.531 +25 13+20 0.092 +23 72.8 +82.0.315 姓.15 96 + 64 176 +25 11.4 + 0.2408 +26 36 T8 96 姓.64 7.56+4.21.2X 1.4= 0.37 X8.4 = 3.14X2.8= 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=2.84 X0.03 = 4.8+23 = 0.382 X0.13 = 4.2+4.5=1.64 +2.35= 8.65-6.31 = 28.448 +14= 10.88 +34= 0.58 X250= 12.5 +3.6= 10 - 7.64= 1.86 X 7= 13.88 - 6.29= 926 X0.15= 8 700= 100.2 - 2.28 26.3+ 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 0.22 2.8 X 4.583.57+4.2 45 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 4.08^8= 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=5.98 姓.23= 19.76 十5.2=10.8 -M.5=8.84 +1.7= 6.21 ".03= 1.89^0.54=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=21 +1.4=2.1 姓.4= 2.56 T.2= 50.18 T8.6= 4.68 以5=。