小數(shù)乘法計(jì)算道含答案

1、小數(shù)乘法計(jì)算600 道第一部分一計(jì)算題（共50 小題）1直接寫出得數(shù)1.25X 0.8=99X0.25=0.4X0.02=1.8 X 0.4=6X0.25=3 0.98=0.9 + 0.01=3.9X0.01 = 2用豎式計(jì)算下面各題2.4 X 1.5=0.46X8.7=（保留一位小數(shù)）2.24X1.8=（保留兩位小數(shù)）3用豎式計(jì)算（得數(shù)保留兩位小數(shù)）3.35X1.7弋5.63X 3.9弋4用豎式計(jì)算2.97X3.5=6.05X 0.83=0.78X4.5=3.36X3.67=5直接寫得數(shù)6.2X 0.3=2.5X0.8=0.06X 5=0.16X25=5X2.1=0X48.76= 6用豎式計(jì)

2、算（計(jì)算結(jié)果小數(shù)部分超過兩位的，保留兩位小數(shù)）6.02X0.350.59+1.4.7按要求算一算2.9X1.84.58X0.370.8X2.5 （得數(shù)保留一位小數(shù)）5.45X1.72 （得數(shù)保留兩位小數(shù)）8列豎式計(jì)算：1.8X0.85=7.6- 2.19=50- 18.75=9用豎式計(jì)算4.68X1.2=1.58X2.5= 10豎式計(jì)算6.4X8.05.1.35X27036X5.518X3.063.45X210.28X0.25150X0.120.87X 1.50.4X0.0761.5X0.0626.5X0.0412.豎式計(jì)算.4.06X0.75 （保留兩位小數(shù)）0.94X5.3=0.91 X

3、2.6=8.43X1.5=0.25X3.2=7.8X0.9 （保留一位小數(shù)）13 .直接寫出得數(shù).0.25X4=1.25X8=8.2X6.9X0=0.2X 18=6.29X100=0.02X500=3.4X2=0.26X0.5=14 .我會(huì)口算.0.5 X 4.4=80+1.6=5.5 + 0.11 =0.06X 5=5X0.4X0.8=9.9+10.1 =1.25X0.8=0.08+0.1 =4-0.15=1.7X5+0.3X5=15 . 口算.3九二5九二5X3.14=0.5X7=92=62 - 32=4九一1.5九二34.6-0.5=6.5X0.2=0.1 X0.01 =0.87- 0.

4、6=1.7X3=0.02X 500=2.5X 0.4=2.8X0.17=0.57+0.43=2.8X 10=4.87- 1.7=16 .用豎式計(jì)算，得數(shù)保留一位小數(shù).2.4X673.5X0617 .直接寫出得數(shù).0.8X25=0X4.23=18 4 X 0.2=8.29X100=18 .列豎式計(jì)算.0.64 X 12.5=19 .直接寫出得數(shù).0.7X0.9=0.14X0.3=20 .用豎式計(jì)算2.75X3.1=3.18X5.45=0.76X2.18七（得數(shù)保留兩位小數(shù)）21 .列豎式計(jì)算0.36X0.15=（得數(shù)保留兩位小數(shù)）0.86 X 1,4=（得數(shù)保留一位小數(shù)）22 .用豎式計(jì)算.8X

5、0.12=1.9X3.5=5.5X 10=2.6X 0.5=0.09X1.7Q（精確到十分位）1.45X0.12=6.5X0.39=2.3X1.29=（驗(yàn)算）0.401X0.3=0.45X0.96=0.17X0.71=（得數(shù)保留兩位小數(shù)）23.直接寫得數(shù).70X0.01 =2.515X 10=1.1 X 0.4=10 + 0.3=24 .豎式計(jì)算.（得數(shù)保留一位小數(shù)）0.38 0.25=0.12 15=5.79X3.69.8-1.64=3.6X2=5.7+3=4.5 6=0.1 3.1=0.38X0.2325 .豎式計(jì)算.26 6X0.25=26. 口算.0.7X0.5=0.36+9=4.6X

6、0.25.3.1X300=0.4X1.7=6.6 2=27 .直接寫出計(jì)算結(jié)果0.3 1.1=5.79+2.31+4.21=0.25 4=1.2+ 0.4=1.5 0.6=1.59+ 0.3=0.5X 101 =6.5 5=10-8.88-0.12=0.64+ 1.6 X 1.5=28 .直接寫得數(shù).0.6X0.7=0.8X5=1.1 X 0.4=2.3X4X0=0.05X1.6=0.02 7=29 .用豎式計(jì)算.0.32 0.8=1.36 4.8=17.3 0.06=30 .用豎式計(jì)算.1.45X0.12=3.08 0.28=13.5X26.7=3.15X0.35七（保留一位小數(shù)）31 .

7、口算.9.37 0=7.3 100=289+72 - 89=1 - 0.04=4X 8 + 8X4=32 .列豎式計(jì)算:30.5 0.760.54X0.19.33 .直接寫得數(shù):2.5 33.06 20.25 44.2 105.3X1002.5 62.2 41.6 41.25 834.豎式計(jì)算8.5X0.39=（驗(yàn)算）0.87X1.5 （保留二位小數(shù)）35.用豎式計(jì)算并驗(yàn)算.14.53+5.677.2-6.451.05X2.862.9+ 1.7.36. 口算:0.5X2=0.25X4=12.5 8=7 + 0.7=1 -0.125X8=1.25 32=37. 口算0.2 X 0.4=8.2+1

8、.8=6.45X 0.01 =0.8X50=2.4X5=0.9 0.52=38.豎式計(jì)算,帶*的要驗(yàn)算*4.23 X 0.02836 0.560.125X8=0.25 56=2.5 0.4=10.2X4.5=31.5X24.50.8X0.56*0.63X1.051.8X3.670.12X0.04=0.8X 100=39.豎式計(jì)算（得數(shù)保留兩位小數(shù)）54.3X0.7 （得數(shù)保留整數(shù)）35.4X0.87.63X 1.20.08X1.143.17X2.80.3X5.6 （得數(shù)保留一位小數(shù)）40.列豎式計(jì)算24.6+124.32+1.221 + 0.15.41.直接寫出得數(shù)0X7=2.6+0.4=21

9、.2-21 =0.4 0.4=15X0.01 =1.8a+0.2a=2.5X4X0=0.72X0.8=0.56+4.44=82=35X0.4=12.5X4=42. 口算.0.12X 100=6.2X 10=500-1000=12萬+3萬二8a+a=6.2-10=3.74 X 100=23.6-100=3.25X 10=43.豎式計(jì)算0.18X123.26X 153.1X1714X0.58.4X 150.45X 90.02X134.28X 162.61 X 181.25X41.5X3544 .直接寫出得數(shù).q40 X 1.2=25 X 0.4=6 =7.8+0.9=2.4X 0.5=1.25X

10、80=3.6-0.06=12-0.4=45 .列豎式計(jì)算2.034X 184.06X3.8 （積保留兩位小數(shù)）46 .計(jì)算4X38.2=8X0.352=35.6X 5=6.7X3=47 . 口算9.5X0.2=3.2X 0.5=0,8X 2,5=4,4X 0,4=4.8X50=4.8X0.25=8.8X5=1,4X0,5=48 .豎式計(jì)算. 0.43X 27=1.85X 2.6=驗(yàn)算：0.37X2.4Q（得數(shù)保留一位小數(shù)）7.02X0.56七（得數(shù)保留兩位小數(shù)）49.直接寫出得數(shù).0.7X0.9=1.7X0.03=50.豎式計(jì)算.5.6 X 1.8=第二部分一.計(jì)算題（共1 .列豎式計(jì)算：1.

11、8X0.36=2.6X0.5=1.8 0.04=0.25X0.046Q50小題）0.14X0.3=0.12X6=（保留兩位小數(shù)）35.37+28.63=1.06X0.48=18.9+28.65=5.5X 10=4.8 5=3500X0.96=19.9- 8.75=22.87- 18.65=2 .用豎式計(jì)算下面各題.2.24X 1.8=（保留兩位小數(shù)）0.25X7X0.4=2X 0.5+1 =2.4 X 1.5=0.46X 8.7=（保留一位小數(shù)）3 .直接寫得數(shù).0.102X 100=4.2+3=0.23X0.5=3.6 + 0.6=42=0.1 + 0.01 =4 .用豎式計(jì)算（計(jì)算結(jié)果小數(shù)

12、部分超過兩位的，保留兩位小數(shù)）6.02X0.358.74+ 3.80.59+1.4.5 .列豎式計(jì)算：1.8X0.85=7.6- 2.19=50- 18.75=6 .用豎式計(jì)算.4.8X0.259.3X 1.39.8X0.52.1X2.15.7 .用豎式計(jì)算.（得數(shù)保留兩位小數(shù)）8 .35X1.7弋5.63X3.9弋 8.直接寫出得數(shù).0.12X0.4=3.8+ 100=56.56-0.561.6+3.04=1.28- - 0.8=2.8-0.7=0.53 X1000=108-2.5-4=9 .列豎式計(jì)算3.48X1.05 （計(jì)算并驗(yàn)算）1.55-3.8 （得數(shù)保留兩位小數(shù)）10 .豎式計(jì)算0

13、.64 X 18=25.8 X 102=40,7X0.25=13.45X2.6=（保留整數(shù)）4.865X8勺（保留整數(shù)）10.23X42（保留一位小數(shù)）11 .直接寫得數(shù).6.2X 0.3=2.5X0.8=0.06X5=0.16X25=5X2.1=0X48.76=12 .按要求算一算.2.9X 1.84.58X0.370.8X2.5 （得數(shù)保留一位小數(shù)）5.45X1.72 （得數(shù)保留兩位小數(shù)）13 .用豎式計(jì)算.84X0.25=0.55X64=0.47X5.8=6.06X0.32=0.075X0.07=3,7X9.77=14 .列豎式計(jì)算.3.4X0.256.5X2.40.035X0.61.2

14、5X0.024.15 .用豎式計(jì)算.2.97X3.5=6.05X0.83=0.78X4,5=3.36X3.67=16 .用豎式計(jì)算.36X5.518X3.063.45X210.28X0.25150X0.120.87X1.50.4X0.0761.5X0.0626.5X0.044.57X 1.89.37X8.518.豎式計(jì)算.0.94X5.3=8.43X1.5=19.我會(huì)口算.0.5 X 4.4=5X0.4X0.8=0.125X0.82.07X3.60.91 X2.6=0.25X3.2=80 + 1.6=9.9+10.1 =3.75X0.243.35X 1.6.4.06X0.75 （保留兩位小數(shù)）

15、7.8X 0.9 （保留一位小數(shù)）5.5 + 0.11 =1.25X0.8=0.06X5=0.08+0.1 =17.豎式計(jì)算23.用豎式計(jì)算.4-0.15=1.7X5+0.3X5=20.列豎式計(jì)算，帶*號(hào)的要驗(yàn)算.25.78+3.12=21.直接寫出得數(shù).0.125X 100=15.7+4.3=14.6+0.34=13.8X9=*8 - 2.67=*5.73+6.7=60+100=9+10=0.32+4.68=25X4=10-0.8=7義 99+7=30.5+2.5=24-7.54-2.46=26+19+74+814.68X1.2=23.用豎式計(jì)算，2.4X6.7弋24.豎式計(jì)算7.6X0.8

16、2=25. 口算.3九二5九二92=62- 32=26.直接寫出得數(shù).0.8X25=2.4 X 0.2=7.5X0.59=（驗(yàn)算）0.5X7=34.6-0.5=0.57+0.43=2.8X10=8.29X 100=2.5X 0.4=27 .列豎式計(jì)算.0.64 X 12.5=2.8X0.17=28 .列豎式計(jì)算4.8X 171.88X252.4X0.3729 .列豎式計(jì)算.（得數(shù)保留兩位小數(shù)）2.375X 1055.16X4.330 .列豎式計(jì)算.4.87- 1.7=0.89X5.3.0.45X0.206.1.58X2.5=得數(shù)保留一位小數(shù).3.5X 0.53.25X 0.31 =5X 3.1

17、4=41 .5 7t0X4.23=0.02X500=35.用豎式計(jì)算.0.04X0.124.25X8.83.84X0.25.31.豎式計(jì)算.3.6X0.25=9.8- 1.64=3.1X300=32 .用豎式計(jì)算2.75X3.1=3.18X5.45=0.76X2.18七（得數(shù)保留兩位小數(shù)）0.09X1.7Q（精確到十分位）33 .列豎式計(jì)算0.36X0.15=（得數(shù)保留兩位小數(shù)）1.45X0.12=6.5X0.39=0.86X1.4=（得數(shù)保留一位小數(shù)）8X0.12=1.9X3.5=2.3X1.29=（驗(yàn)算）0.401X0.3=0.45X0.96=0.17X0.71=（得數(shù)保留兩位小數(shù)）43.

18、用豎式計(jì)算.35 .直接寫出得數(shù).0.7X0.9=0.14X0.3= 5.5X10=2.6X 0.5=36 .列豎式計(jì)算：37 .5X0.760.54X0.19.37 .豎式計(jì)算.1.35X2706.4X8.05.38 .直接寫得數(shù).70X0.01=2.515X 10=1.1 X 0.4=10+0.3=6.5X0.2=0.1 X0.01 =0.87- 0.6=1.7X3=39 .列豎式計(jì)算40 .6+124.32+1.240.直接寫出得數(shù).0X7=15X0.01 =1.8a+0.2a=0.12X0.04=2.5X4X0=21 + 0.15.2.6+0.4=21.2-21 =0.4 0.4=0.

19、8X 100=0.72X0.8=41.豎式計(jì)算.（得數(shù)保留一位小數(shù)）0.38X0.235.79X3.64.6X0.25.0.32X0.8=1.36X4.8=17.3X 0.06=（*驗(yàn)算）16.51-6.3=3.6X2=5.7+3=3.08 0.28=（得數(shù)保留一位小數(shù)）900 4.58=*56.7+0.33=0.4X1.7=4.5X6=6.6 2=0.1 3.1=13.5 26.7=（得數(shù)保留二位小數(shù)）0.12X15=0.87X 1.55.79+2.31+4.21=1.59+ 0.3=0.64+ 1.6X 1.5=150X0.1243.豎式計(jì)算8.4X0.15=44 . 口算.0.7X0.5

20、=0.36+9=45 .用豎式計(jì)算.1.45X0.12=3.15X0.35七46.豎式計(jì)算0.38 0.25=8.5X0.39=（驗(yàn)算）47.直接寫出計(jì)算結(jié)果0.3X1.1 =1.5 X 0.6=10-8.88-0.12=48 .豎式計(jì)算0.38X0.250.25X4=1.2 +0.4=0.5X101=6.5-5=0.87 1.950.1.28 2.32.07 0.240.17 1.0549 .用豎式計(jì)算.8X0.12=（驗(yàn)算）1.9X3.5=（驗(yàn)算）0.401X0.3=0.45X0.96=0.17X0.71 =直接寫出得數(shù).0.13X0.2=1 0.9=0.32+2=0.8X5=0.9X0.

21、1 =3.11+2.22=0.52=8m 6m=1.62-0.62=5.9+4.4=0.053X100=12.5+12.5X7=第一部分參考答案與試題解析一.計(jì)算題（共50小題）1.【解答】解:0.4 X 0.02=0.0081.8X 0.4=0.726X 0.25=1.51.25X 0.8=13 0.98=2.020.9+ 0.01=90 3.9X 0.01=0.03999X 0.25=24.752.41.51 20240.4 6x 8.73223682.【解答】解:2.2 4x 1.B17922241) 2.4X 1.5=3.6 3.6 0(2) 0.46X8.74.0 4.0 0 233

22、 5x 17234$(3) 2.24X 1.85.63 史 506716gg4.03 4.0 3 23.【解答】 解：3.35X1.7 = 5.70 5,6 9 55.63X 3.9 = 21.962.9 7對(duì)5148589 16.05* 0.83181548404 .【解答】 解：2.97 X 3.5=10.395 10.3 9 56.05 X 0.83=5.0215 5.02150.78 XS 5 7 4- a *3 36*3.(574.5=3.5192 1*,1-3 %2 01 610 0S3.36X3.67=12.3312 一二一5.【解答】解:6.2X0.3=1.862.5X0.8=

23、2 0.06X5=0.3 0.16X 25=4 5 X 2.1=10.50 X 48.76=0屋 又需3010- 1 廣18061 1 a _6 .【解答】 解：6.02 X 0.35 2.11 2.1070 8.74- 3.8=2.30 0.59 + 1.4 Q0.4211網(wǎng)0電95 6-3028201£0.42,952 LK2392 27.【解答】 解：2.9X 1,8=5.22 5.2 2 4.58X0.37=1.6946心8M3732 061 3741 . 一 0.82.5 ,01gX 2.5=2.05.45X1.72=9,37 37位8.5 451.SM Q 8590144

24、【解答】 解：1.8X0.85=1.53 L530 7.6 -9.工650- 2.19- 1S.752.19=5.41 一 一 50- 18.75=31.25二74.68X 2-93G- 468【解答】 解：4.68X 1,2=5.6163Tl6- 1.58X1.5 S x 2.5-7903 1 62.5=3.95270 x 1.35-175CT81027010.【解答】解：1.35X270=368.5 3g一6.4X8.05X6.4365.5322048308.05=51.5211 .【解答】解：(1) 36X 5,5=198;1980 (2) 18X3.06=55.08;3.0 6x 1

25、8244 8 3。65 5.0 83.4 5x 2 1345 69。(3) 3.45X21=72.45;7245(4) 0.28X 0.25=0.07;0.2 8 x 0.2 5 -FTo 560.0 7 0 Q(5) 150X0.12=18;150 x (U2301 51 8.QQ(6) 0.87X0.8 7x 1.54 3 50.0 7 68 7X M1.5=1,305; L3 ° 5( 7)0,4X 0.076=0,0304;003 04(8) 1.5X0.062=0.093;0.0 6 23 10626.5* 0.0 40.94 k 53 2S2 47000 9 30(9)

26、6.5X0.04=0.26.0.2 612.【解答】解：(1) 0.94X5.3=4.982;4.9820.914.068.43x 2.6_x 0,75_x 1.5546一 2030421?843(2) 0.91 X2.6=2.366; 2366 (3) 4.06X0.75=3.05; 3350 ( 4) 8.43X 1.5=12.645; 12.6450.25x 3.2507.875-紇(5) 0.25X 3.2=0.8; 0,800 7.8X0.9=7.0.13.【解答】解：0.25X4=11.25X 8=10 8.2X 6.9X 0=00.2X 18=3.66.29X 100=6290.

27、02X 500=103.4X 2=6.80.26X 0.5=0.1314 .【解答】解：0.5X4.4=2.280+1.6=505.5+0.11=500.06X5=0.35X0.4X0.8=1.69.9+10.1=201.25X0.8=1 0.08 + 0.1=0.84-0.15=3.851.7X 5+0.3X 5=1015 .【解答】解： 3 兀=9.425 兀=15.7 5X3.14=15.7 0.5X 7=3.592=81 62 - 32=27 41.5 冗=7.854.6 + 0.5=69.22.4* 071683.514 4 Q316.【解答】解：2.4X6.7=16.1 1&

28、;08 3.5X0.5=1.8L7517.【解答】解:0.8X25=20X4.23=00.57+0.43=12.4X0.2=0.48 0.02X500=102.8X 10=288.29X100=8292.5義 0.4=14.87- 1.7=3.171232.8x 0,6 4x 0177502 818.【解答】解：(1)0.64X12.5=8(2) 2.8X0.17=0.476 047619.【解答】 解：0.7 X X 0.3=0.0425.5X 10=552.6 X 0.5=1320.【解答】 解：(1) 2.75 X2.7 5x 313.1 8x 5.4 52 75825159012721

29、5903.1=8.525 8.52 5 - (2) 3.18X 5.45=17.3311 7 3 3 1V(3) 0.76X2.18-1.66 (得數(shù)保留兩0 76x 2.1 8608761 52位小數(shù))L6568(4) 0Q9X 1.7-0.2 (精確到十分位)1.7 x 0090.1 5 321.【解答】解：0.360.36乂 0.15-L80-36X 0.15 % 0,05 0 05 A 1.451.45xQ.12290145X 0.12=0.174 0.1740 0.860.86x L4-34 486X 1.40.1 0.120 4 6.5 X6.51.9算 0.39x 3.55850

30、-12-931 95x 85 70.39=2.535 2.53522.【解答解：8 X 0.12=0.96 096 1.9X 3.5=6.65 6.6 52.3 X算：小7 0 7*387*25 82 96 71.29=2.9672.9 6 70.40 1 0.30.401 X 0,3=0.1203020 30.45 X0.450.17*0一96x Q 712 70rr40 51 190.96=0.432 0 43 20 0.17X 0.710,12 0120723.【解答】解: 70X 0.01=0.72.515X 10=25,151.1 X 0,4=0,44 10+ 0.3=10.3 6.

31、5X02=1.3 0.1 X0.01=0.001 0.87-0.6=0,271.7X3=5.15,7 90.38X 3* 617 3 724.76【解答】 解：0.38 X 0.23 0.1 0-08 74 5.79 X 3,6 20.8 2 0. 8 4 4 4.6X0.25上4.60.2 53.6X0.2 52 3 01 8 09.89272-1.641.2 L15 風(fēng) 25.【解答】 解：3.6X 0.25=0.9 0.9 0。9.8- 1.64=8.168.1 6 3.1 X3. 1X 3 0 0300=930 9 3 0 026.【解答】解： 0.7X 0.5=0.353.6X 2=

32、7.20.4X 1.7=0.684.5X 6=27 0.36+9=9.36 5.7+3=8.7 6.6X2=13.2 0.1 X 3.1=0.3127 .【解答】解：0.3X1.1=0.335.79+2.31+4.21=12.310.25X4=11.2-0.4=31.5X 0.6=0.91.59+ 0.3=5.30.5X 101=50.56.5 -5=1.5 10 8.88 0.12=1 0.64+ 1.6 X 1.5=0.628 .【解答】解:0.6X0.7=0.420.8X5=41.1X0.4=0.440 32x 0.817.3k 0.0629.【解答】解：0.32X0.8=0.256 0

33、.2561.36X4.8=6.528 ： 17.3X0.06=1.038 一二：1.45x0.12290145【解 答】 解：1.45 X 0.12=0.1740-17403.08 X3 08x 0.2824646他0.28=0.8624 二公二：13.5 義2.3 X 4 X 0=0 0.05 X 1.6=0.08 0.02X 7=0.141.36x 4.8108854413.5* 2 6.7713S1 027026.7=360.4531 .【解答】解：9.37 X 0=07.3 X3 0.5 x076 18302 1350.76=23.18-:3.15他3515759453.15 X 0.

34、35= 1.1 102532 .【解答】解：30.5 X100=730289+72 89=2721 0.04=0.964 X 8 + 8 X 4=160.5 4 o.jg481 -540.54X0.19=0.1026° 102 633.【解答】解:2.5X 3=7.5 3.06X 2=6.12 0.25X 4=14.2 X 10=42 5.3 X 100=5302.5 X 6=152.2 X 4=8.8 1.6 X 4=6.41.25X8=100-3 80.12x 02 5x i 5I"k761234 .【解 答】 解：0.38 X 0.25=0.095 0 095飛一 0

35、.12 X 15=1.8市® - 8.5 X0.39=3.3158 5 父0一3976525 5 33T?驗(yàn)算：19519500.S7 x 1,58 70.87 X 1.5= 1.31 13 0 514,53黯算53735 .【解答】解：14.53+5.67=20.2之0段工677 2蛉算一H二 6一45207.2 - 6.45=0.75 ° 756.45-0.757 2Q1.05x 2.884021。 1.05X 2.8=2.94 '驗(yàn)算:3751"17911 9 62.9+ 1.7=375驗(yàn)算:37 x1725937 _,62.9-36 .【解答】解：

36、0.5X2=1 0.25X4=112.5X8=1000.125X8=17 + 0.7=10 1 0.125X 8=0 1.25X 32=80 0.25X 56=1437 .【解答】解:0.2X 0.4=0.088.2+1.8=106.45 X 0.01=0.06452.5X0.4=10.8X50=40 2.4X5=12 0.9-0.52=0.2810.2X4.5=45.94.2 3其 09 2 83 3 84S46五1 I g 4 4423驗(yàn)算：ft:& 2 8 /M 1 84 4f 1 1256&48438.【解答】 解：*4.23 X 0.028=0.1184436 X3

37、1.5362 4.5x65 61 5 7 5 一2 1 61 2 6 00.5 6180630黑 os0.56=20.16 2 0.1631.5 X 24.5=771.75 7 7 1.7 5 0.8 X 0.56=0.448 0。4 £*0.63 X1.0 50.6 33 156300.6 6 1 51.05=0.66150.3驗(yàn)算：杖§ / 3 6153.6 76 3 0x L831529363153670 1.8X3.67=6.6066一6 0 639.【解3 5.4-0.S 答】解：35.4X0.8=28.32 327 63一 L2 1526 7637.63X 1.

38、2=9.156 H 5 =0.08X5.17 x 2一1142536XO.OS6341.14=0.0912 00912 3.17X2.8=8.88;S.8765.6然S30.3 義 5.6= 1.7 L6 85 4.3-0.754.3 X 0.7= 4 3 8 0 11.2=3.640 .【解答】解：24.6 + 12=2.05140&J210015-606021 + 0.15=140。41 .【解答】解:0X7=02.6+0.4=315X0.01=0.1521.2- 21=0.204.32 +1.8a+0.2a=2a0.4X0.4=0.160.12X 0.04=0.00480.8X1

39、00=802.5 X 4 X 0=00.72X 0.8=0.57642.【解答】解：0.12X100=126.2X10=62500+1000=0.512 萬+3 萬=15 萬 8a+a=9a6.2+ 10=0.623.74 X 100=374 23.6+ 100=0.2363.25X 10=32.50.1S3.26，12x 15361 6 3 0IS32643.【解答】 解：(1) 0.18X 12=2.16 36(2) 3.26X 15=48.9 下 90(3) 3.1 X3.18.4乂17xl521 7L251442 031_X 4* 0 58417=52.7 52.7 (4) 1.25X

40、4=5 5.00 (5) 14X0.5=770(6) 8.4X 15=12612601.5(7) 0.45X9=4.05乂3 5045TT13x 945m0 024-05 (8)1.5X35=52.5 52.5 (9) 0.02X 13=0.26 。加 (10)4.28* 166S42 24.28X16=68.48 68482.61x 1820 8S 1(11) 2.61X18=46.98 他舞44.【解答】解:40X1.2=48 25X0.4=10 63=2167.8+0.9=8.7 0.56+4.44=52.4 X 0.5=1.2 1.25X 80=1003.6 + 0.06=6012 +

41、 0.4=3082=642.0344,06x 18x 3.81 627232 482 034121845.【解答】解：2.034X18=36.612 3 6,612 4.06X3.8=15.431542846.【解答】38*2X 40. 352X 835.6X 5解：4 X 38.2=152.8 1521 8 8 乂 0.352=2.816 比81635.6 X 5=17806.7 X6. 7X 33=20.1 NO-1 47.【解答】解：9.5 X 0.2=1.9 3.2X 0.5=1.6 0.8 X 2.5=2 4.4X 0.4=1.7635X 0.4=144.8X50=2404.8X0.

42、25=1.28.8X5=44 1.4X0.5=0.7 12.5X4=501.8 5 乂 2.6 11103 704.3 1 0臉?biāo)悖?_竺ls85j 413 701 11 01 11 00.370.3 7x 2.414 87450.【解答】 解：5.6 X 1.8=10.085.6 x l.gF 8 560.0 4 6x 0,2 52 3 0920.25 義 0.046 y 0.01 °。1 1 5a 3500 義0.43乂 27 301 8 648.【解答】解：0.43X27=11.61; 11.61 1.85X2.6=4.81;7.02xO.5642123 510X 2.4= 0

43、.9（得數(shù)保留一位小數(shù)）；0,88 8 7.02 X 0.56= 3.93 （得數(shù)保留兩位小數(shù)）；39312 49.【解答】解:0.7 X 0.9=0.63 2.6X 0.5=1.30.14X 0.3=0.0425.5 X 10=551.7 X 0.03=0.051 1.8X 0.04=0.0720.12X6=0.724.8 X 5=243 5 00x 0.9 63 15_0.96=3360第二部分參考答案與試題解析一.計(jì)算題（共50小題）1.【解答】解:1.S1 0S* '4X0.3 619 g8 7535.37- 28.631.8 X 0.36=0.648 0 64s35.37+2

44、8.63=64 胡風(fēng) 19.9 - 8.75=11.1511-151.06 X1.06x 0 4gS4842 418.92S.6522.87-1X652.4 x 1J512 0 24一 2.【解答】2.2 4x 1.81 7百22240.48=0.50880.50 SS18.9+28.65=47.5547 55 22.87 18.65=4.220.4 6x 8.7322368解：(1)2.4X1.5=3.6 36 0 (2)0.46X8.74.0 4.0 0 2 (3)2.24X1.84.03 4.D323.【解答】解:0.102X 100=1024.2+3=7.20.23X0.5=0.115

45、0.25X7X0.4=0.73.6-0.6=642=160.1+0.01=102X0.5+1=2【解答】解：6.02 X 0.35 0.426 02 x 0.35 301018062.11 2.1070 8.74 + 3.8=2.3,如7 47 6 _ TTT_L1 4 一口 0.59+1.4 =0.421 間059282014-65.【解答】解:501S.7518.75=31.25 一6.【解答】解:2.1 5X 2.19.8 xO.50.5=4.9 42.1X2.15=4.515 -一 _ 一1.S 品0 85 901447.62.191.8 X 0.85=1.53 1.530 7.6-

46、2.19=5.41 5-41 50 4.8X0.252409693、1 3279934.8X0.25=1.2 1.2009.3X1.3=12.09 120 g9.8 X3.3 5x 1.72345 7.【解答】 解：3.35X1.7=5.70 5,6 9 55.635.63乂 3.9一§06 71685)X 3.9弋21.96 219378.【解答】解: 0.12X0.4=0.048 3.8+100=0.03856.56+ 0.56=101 1.6+3.04=4.6419.28- 0.8=18.482.8 + 0.7=40.53X 1000=530 108+2.5 + 4=10.83

47、.48 m 105 1740 3485.O41 5833即口39.【解答】解：3.48X1.05=3.65436541K驗(yàn)算:17 4017 4000 407斫而一 152 _"3002661.55+ 3.8=0.414 0.7 乂僅2 5 20358 1 44.S65x S0.6425.8ISxl0 25 125166 425810 .【解 答】 解：0.64 X 18=11.52 I1與 25.8 X 102=2631.6 2631640.7 X1 3.4 5x 2.68 0 7 026900.25=10.175 104 7 513.45 X 2.6 = 35 3 4.9 7 & 4.865 X 8 = 39 3&92& 10.23 X 42 =10.23x 4220 46409 2429.7 429.6611.【解答】解:6.2X0.3=1.862.5X0.8=2 0.06X5=0.30.16X 25=4 5X2.1=10.50X48.76=019«1.8232294.58他3732 061 37 412.【解答】解：2.9X1.8=5.22 5.2 24.58X0.37=1.6946 1.69 46 0.8X2.5=2.02.5x 0.85.455.45乂 17284x 0.2516 80.55642 2033 0X 1