五年级上小数乘除混合运算习题
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五年级上小数乘除混合运算习题
一、计算题(30分)
1、直接写出得数。
0.45×2.5=1.1250.8×1.25=10.3×3.6=1.080.3×0.3=
0.0910×0.07=0.70.3×1.4=0.420.05×7=0.350.92×0.4=
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=10100-35.22=64.78
2.3×4=9.22.5×0.4=12.4×5=120.22×4=0.88
3.25×0=00.9-0.52=0.383.99×1=3.990×3.52=012.5×8=100
8÷10=0.810-1.8-7.2=10.43+3.57=42.5×4×12=120
0.9×0.8=0.727.5x-
3x=4.5xa+3a+7a=11a1.05×100=1051÷0.5=20.96÷3=0.321.47÷0. 7=2.15.4÷6=0.90.165×10=1.650.56×100=563.78×100=3784÷0. 8=5
3.215×100=321.50.8×10=8
4.08×100=4081.1×0.2=0.22
0.6×0.8=0.483×0.9=2.72.5×0.4=13.6×0.4=1.4412.5×8=10 050×0.04=280×0.3=2.41.1×9=9.9
0.16×5=0.81.78+2.2=3.989.6÷0.6=161.2×0.5-
0.4=0.20.7÷0.01=702.5×0.4=112-3.9=8.11.25×8÷1.25=8
6.6÷0.66=105.37×0+4.63=4.633.9+2.03=5.934.2÷3.5=1.2
1.6+
2.4×0.3=2.322.14-0.9=1.2427+456+
73=5560.3×0.3=0.09
7.2+2.8=100.9÷0.01=9012÷0.3=402.87÷0.7=4.1
13÷4=3.250.96÷0.3=3.21.5×0.4=0.67÷0.25=28
2.5×0.7×0.8=1.48-2.5=5.516÷1.6=
105.6×1.01=5.6568×(2.5+0.25)=220.36+0.64=164.32÷16=4.024.2÷0.1=4272.8÷0.8=918.4÷4.2=213.8+9.9=
23.72.4×2.5=6
0.05×0.8=0.042.56-0.37=2.191.25×0.8×0.5=
0.512×2.5=30
1.23×3=3.693.2÷1.6=23.5+3.5×3=1419.6÷2=9.8
8.8÷2.2=40.75×4=3(1.5+0.25)×4=70.5×0.8=0.4
8.4×0.2=1.681.6×0.2=0.327.2×0.3=2.162.8×0.3=
0.840.9÷0.15=61.8×0.4=0.725.5÷0.55=100.08×100=8
2.2÷0.11=205.46+4.54=1012.5×0.8=100.35×0.3=0.105
1.4×5=7
2.8×4=11.219.6÷4=4.922.5×4=90
2、用竖式计算
0.396÷1.2=0.330.756÷0.36=2.115.6×13=202.8
0.18×15=2.70.025×14=0.353.06×36=110.16
0.04×0.12=0.00483.84×2.6≈10.05.76×3=17.28(保留一位小数)
7.15×22=157.390.75÷3.3=27.53.68×0.25=0.92
16.9÷0.13=1301.55÷3.9≈0.403.7×0.016=0.0592
(保留两位小数)
13.76×0.8=11.0085.2×0.6=3.128.4×1.3=10.92
6.4×0.5=3.24.48×0.4=1.7925.25×5=26.25
35.4×4.2=148.680.042×0.54=0.022680.76×0.32=0.2432
0.25×0.046=0.01152.52×3.4=8.5681.08×25=27
0.12×0.5×0.16=0.00964.8×0.25=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)
2.5×7.1×416.12×99+16.125.2×0.9+0.9
=71=1612=5.58
7.28×99+7.284.3×50×0.264-2.64×0.5
=72.8=43=62.68
26×15.7+15.7×24(2.275+0.625)×0.28
=785=0.812
3.94+3
4.3×0.21.2×(9.6÷2.4)÷4.8
=10.8=1
8.9×1.1×4.72.7×5.4×3.93.6×9.85-
5.46=4
6.013=56.862=30
8.05×3.4+7.66.58×4.5×0.92.8×0.5+1.58
=34.97=26.649=2.98
32+4.9-0.94.8-4.8×0.5(1.25-0.125)×8
=36=2.4=9
4.8×100.156.5×99+56.57.09×10.8-0.8×7.09