小數(shù)乘除法計(jì)算題復(fù)習(xí).

1、小數(shù)乘法分類(lèi)強(qiáng)化練習(xí)一、計(jì)算題（ 30 分）1、直接寫(xiě)出得數(shù)。0.452.50.8 1.250.3 3.60.30.3100.070.31.40.0570.920.40.20.260.1440.020.11.20.30.20.48.21.810035.222.342.50.42.450.2243.2500.90.523.99103.5212.58810 =10-1.8-7.2=0.43+3.57=2.5 412=0.9 0.8=7.5x-3x =a+3a+7a=1.05 100=10.5=0.96 3=1.47 0.7=5.4 6=0.16.5 10=0.56 100=3.78 100=40.

2、8 =3.215 100=0.8 10=4.08 100=1.1 0.2 =0.6 0.8 =30.9=2.5 0.4=3.6 0.4=12.5 8=500.04=800.3 =1.1 9=0.165 1.782.2 =9.60.6 =1.20.5-0.4 =0.70.01 =2.50.4 = 123.9=1.2581.25 =6.60.66 =5.370+4.63 =3.92.034.23.51.6+2.40.3 =2.140.927456 73=0.30.3=7.22.80.90.01120.3=2.870.71340.960.31.50.470.252.50.70.8=82.5161.6

3、5.61.01=8（ 2.50.25）0.360.64 64.32164.20.172.80.88.44.213.89.92.42.50.05 0.82.56 0.371.25 0.8 0.512 2.51.23 3 3.2 1.6 3.5 3.5 319.6 2 8.82.2=0.754（1.50.25） 40.50.8=8.40.2=1.60.27.20.3=2.80.30.90.15=1.80.4=5.50.55=0.08 100=2.20.11=5.46 4.54=12.50.8=0.350.3=1.4 5=2.8 4=19.6 4=22.5 4=2、用豎式計(jì)算0.396 1.2=0.

4、756 0.36=15.6 13=0.18 15=0.025 14=3.06 36=0.040.123.842.65.763（保留一位小數(shù)）7.152290.75 3.33.68 0.2516.90.131.553.93.7 0.01613.76 0.8=5.2 0.68.4 1.36.4 0.54.480.45.25535.44.20.0420.540.760.320.25 0.0460.120.50.162.52 3.44.80.251.08 250.1251.4（保留兩位小數(shù)）2.50.7=（保留三位小數(shù)）10.13.3=（商用循環(huán)小數(shù)）10.7512.5=（用乘法驗(yàn)算）3.259.04

5、=（用除法驗(yàn)算）3、脫式計(jì)算（能簡(jiǎn)算的要簡(jiǎn)算）2.57.1416.129916.125.20.90.97.2899+7.284.3500.2642.640.52615.715.724(2.275 0.625)0.283.94+34.3 0.21.2 (9.6 2.4) 4.88.9 1.1 4.72.7 5.4 3.93.6 9.85-5.468.05 3.4+7.66.58 4.5 0.92.8 0.5+1.58324.90.94.84.80.5(1.250.125)84.8100.156.59956.57.0910.80.87.094.85 + 0.351.48.717.4 - 8.77.

6、412.5 0.4 2.5 80.87 3.16+4.649.5 1010.68 （ 5.2 -3.5） 1.2540.5 0.81 0.184.8 （15 2.4）213082576.81+6.81990.25185404.40.83.40.8(9.37+937+937+937) 2542.1.1.1.752.37 6.3+2.37 3.72.5 1.25 0.323.8 10.12.5 (3.8 0.04)7.69 1013.8 10.10.25 39+0.250.125 72460.33+54 0.33(8 5.27)1.256.81+6.81 990.25 185406.8 0.75

7、0.53.75 0.1252.751.53+23.4 7.29.5 9913.5 0.9812.5 8.8二、解方程：54-X=247X=49126X=4213+A=28.52.4X=26.47.5x3x=1851.3-2x=5.524x+6x=63.65.6x+4.4x=5.2三、列式計(jì)算1、20 減去 0.8 的差除以 4 個(gè) 0.3 的和，商是多少？2、一個(gè)數(shù)的 2.6 倍加上 9，和是 35，求這個(gè)數(shù)。（用方程解）3、1.2 與 4 的積，減去 6.除以 5 的商，差是多少？4、2.1 除以 35 的商，加上 4.與 0.45 的積，和是多少？5、一個(gè)數(shù)的 3 倍加上 6 與 8 的積，和是 84，求這個(gè)數(shù)6、4.08 除以 0.6 的商，再乘以 5.，積是多少？7、甲、乙兩數(shù)的積是25.2，甲數(shù)是 56，乙數(shù)是多少？8、把 0.47 平均分成 7 份