小数乘除法练习题及简便计算

1、一、计算题（ 30 分）1、直接写出得数。0.3 3.6 0.3 0.30.45 2.50.8 1.25100.070.3 1.40.05 70.92 0.40.2 0.260.14 40.02 0.11.2 0.3 0.2 0.48.21.10035.222.3 4.5 0.42.450.22 43.25 00.90.523.99 103.52=12.5 48810 =10-1.8-7.2=0.43+3.57=2.5 412=0.9 0.8=1.05 100=1 0.5=0.96 3=1.47 0.7=5.4 6=0.16.5 10=0.56 100=3.78 100=4 0.8=3.215

2、 100=0.8 10=4.08 100=1.1 0.2 =0.6 0.8 =3 0.9=2.5 0.4=3.6 0.4=12.5 8=500.04=800.3 =1.1 9=0.16 5 1.782.2 =9.6 0.6 = 1.2 0.5-0.4 =0.7 0.01 =2.5 0.4 = 123.9=1.25 81.25 =6.6 0.66 =5.37 0+4.63 =3.92.034.2 3.51.6+2.4 0.3=2.14 0.92745673=0.3 0.3=7.2 2.80.9 0.01120.3=2.87 0.71340.96 0.31.5 0.470.252.5 0.7 0.

3、8=8 2.516 1.65.6 1.01=8（2.50.25）0.36 0.6464.32 164.2 0.172.8 0.88.4 4.213.89.92.4 2.50.050.82.56 0.371.25 0.8 0.5 12 2.51.23 33.2 1.63.5 3.5 319.6 28.8 2.2=0.75 4（1.50.25）40.50.8=8.4 0.2=1.6 0.27.2 0.3=2.8 0.30.9 0.15= 1.80.4=5.5 0.55=0.08 100=2.2 0.11=5.464.54=12.5 0.8=0.35 0.3=1.4 5=2.8 4=19.6 4=2

4、2.5 4=2、用竖式计算0.396 1.2=0.756 0.36=15.6 13=13.76 0.8=5.2 0.68.4 1.36.4 0.54.48 0.45.25 50.18 15=0.025 14=3.06 36=0.040.123.84 2.6 5.76 3 （保留一位小数）7.152290.75 3.33.68 0.2516.9 0.131.55 3.93.7 0.01635.4 4.20.042 0.540.76 0.320.25 0.0462.52 3.41.08 250.12 0.5 0.164.8 0.250.125 1.4 （保留两位小数）2.5 0.7= （保留三位小

5、数）10.1 3.3= （商用循环小数）10.75 12.5= （用乘法验算）3.25 9.04= （用除法验算）8CXI6(9CXI9.0 + gCXICXI)9寸9CXI寸96.0+辺 0CXI.9CXI.CXO展 e.寸寸與卜LnL +、91X9CXICXIL.9L +6 莎CXIL.9L X LZ 9CXI (M迟W呂M迟揺)M云 wsOQ寸8.寸9寸.910氏6 908卅(寸cki9.妙CXIL6gx89.992+寸旳 90.8卜XLK6.8324.90.9(1.25 0.125) 856.5 99 56.54.8 100.17.09 10.80.8 7.094.85 + 0.35 1.412.5 0.4 2.580.87 3.16+4.649.5 1010.68 (5.2 - 1.258.7 17.4 - 8.7 7.440.5 0.810.184.8 (15 2.4)2.13. 0. 82576.81+6.81 990.25 185404.4 0.83.4 0.842. 1.25 4.2 1.75(9.37+9.37+9.37+9.37) 252.37 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