五年级小数乘除法计算题练习
一、计算题（30分）
1、直接写出得数。
0.45×2.5＝1.125 0.8×1.25＝ 1 0.3×3.6＝1.08 0.3×0.3＝0.0910×0.07＝0.7 0.3×1.4＝0.420.05×7＝0.35
0.92×0.4＝0.3680.2×0.26＝0.0520.14×4＝0.560.02×0.1＝0.002
1.2×0.3＝0.360.2×0.4＝0.088.2＋1.8＝10 100－35.22＝64.78
2.3×4＝9.2 2.5×0.4＝1 2.4×5＝12 0.22×4＝0.88
3.25×0＝0 0.9－0.52＝0.38 3.99×1＝3.990×3.52＝0 12.5×8＝100
8÷10 =0.810-1.8-7.2=10.43+3.57=4 2.5×4×12=120 0.9×0.8=0.72 7.5x-3x =4.5x a+3a+7a=11a 1.05×100=105 1÷0.5=20.96÷3=0.32 1.47÷0.7=2.1 5.4÷6=0.9 0.165×10=1.650.56×100=56 3.78×100=3784÷0.8 =5 3.215×100=321.50.8×10=8 4.08×100=408 1.1×0.2 =0.22
0.6×0.8 =0.483×0.9=2.7 2.5×0.4=1 3.6×0.4=1.44 12.5×8=10050×0.04=280×0.3 =2.4 1.1×9=9.9
0.16×5=0.8 1.78＋2.2 =3.989.6÷0.6 =16 1.2×0.5-0.4 =0.2 0.7÷0.01 = 70 2.5×0.4 =1 12－3.9=8.1 1.25×8÷1.25 =8 6.6÷0.66 =10 5.37×0+4.63 =4.63 3.9＋2.03＝5.93 4.2÷3.5＝1.2 1.6+2.4×0.3 =2.32 2.14－0.9＝1.2427＋456＋73=556 0.3×0.3=0.09 7.2＋2.8＝100.9÷0.01＝9012÷0.3=40 2.87÷0.7＝4.1 13÷4＝3.250.96÷0.3＝3.2 1.5×0.4＝0.6 7÷0.25＝28
2.5×0.7×0.8=1.48－2.5＝5.5 16÷1.6＝10 5.6×1.01=5.656
8×（2.5＋0.25）＝22 0.36＋0.64＝164.32÷16＝4.02 4.2÷0.1＝42 72.8÷0.8＝918.4÷4.2＝213.8＋9.9＝23.7 2.4×2.5＝6
0.05×0.8＝0.042.56－0.37＝2.19 1.25×0.8×0.5＝0.512×2.5＝30
1.23×3＝3.69 3.2÷1.6＝2 3.5＋3.5×3＝1419.6÷2＝9.8 8.8÷
2.2= 4 0.75×4＝3（1.5＋0.25）×4＝7 0.5×0.8=0.4 8.4×0.2=1.68 1.6×0.2＝0.327.2×0.3=2.16 2.8×0.3＝0.84 0.9÷0.15=6 1.8×0.4=0.72 5.5÷0.55=10 0.08×100= 8
2.2÷0.11=20 5.46＋4.54=10 12.5×0.8=10 0.35×0.3=0.105
1.4×5=7
2.8×4=11.219.6÷4=4.9 22.5×4=90
2、用竖式计算
0.396÷1.2=0.33 0.756÷0.36=2.1 15.6×13=202.8
0.18×15=2.70.025×14= 0.35 3.06×36=110.16
0.04×0.12＝0.0048 3.84×2.6≈10.0 5.76×3＝17.28
（保留一位小数）
7.15×22=157.390.75÷3.3=27.5 3.68×0.25=0.92
16.9÷0.13=130 1.55÷3.9≈0.40 3.7×0.016=0.0592
(保留两位小数)
13.76×0.8=11.008 5.2×0.6=3.12 8.4×1.3=10.92
6.4×0.5=3.2 4.48×0.4=1.792 5.25×5=26.25
35.4×4.2=148.68 0.042×0.54=0.02268 0.76×0.32=0.2432
0.25×0.046=0.0115 2.52×3.4=8.568 1.08×25=27
0.12×0.5×0.16＝0.0096 4.8×0.25＝1.20.125×1.4≈0.18
（保留两位小数）
2.5÷0.7=
3.571 （保留三位小数）10.1÷3.3=3.06(06上面两个点) （商用循环小数）
10.75÷12.5=0.86（用乘法验算）3.25×9.04=29.38 （用除法验算）
3、脱式计算（能简算的要简算）
2.5×7.1×4 16.12×99＋16.12 5.2×0.9＋0.9
=71 =1612 =5.58
7.28×99+7.28 4.3×50×0.2 64－2.64×0.5
=72.8 =43 =62.68
26×15.7＋15.7×24 (2.275 ＋0.625)×0.28
=785 =0.812
3.94+3
4.3×0.2 1.2×(9.6÷2.4)÷4.8
=10.8 =1
8.9×1.1×4.7 2.7×5.4×3.9 3.6×9.85-5.46
=46.013 =56.862 =30
8.05×3.4+7.6 6.58×4.5×0.9 2.8×0.5+1.58
=34.97 =26.649 =2.98
32＋4.9－0.9 4.8－4.8×0.5 (1.25－0.125)×8
=36 =2.4 =9
4.8×100.1 56.5×99＋56.5 7.09×10.8－0.8×7.09 =480.48 =5650 =70.9
4.85 + 0.35 ÷ 1.4 8.7 × 17.4 - 8.7 × 7.4 9.5×101
=5.1 =87 =959.5
12.5×0.4×2.5×8 0.68 ÷(5.2 -3.5)×1.25
=100 =0.5
40.5÷0.81×0.18 4.8 ×（15÷2.4） 2.13×0×8257
=9 =30 =0
6.81+6.81×99 0.25×185×40 4.4×0.8－3.4×0.8
=681 =1850 =0.8
(9.37+9.37+9.37+9.37)×2.5 2.37×6.3+2.37×3.7 3.8×10.1 =93.7 =23.7 =38.38
2.5×1.25×0.32
3.8×10.1 2.5×(3.8×0.04)
=1 =38.38 =0.38
0.25×39+0.25 0.125×72 46×0.33+54×0.33 =10 =9 =33
(8×5.27) ×1.25 6.81+6.81×99 0.25×185×40
=52.7 =68.1 =1850
6.8×0.75÷0.5 3.75÷0.125–2.75 1.53+23.4÷
7.2 =10.2 =27.25 =4.78
9.5×99 13.5×0.98 12.5×8.8
=940.5 =13.23 =110