题目内容

1÷0.5= 5÷40= 2.4×3= 0.8×0.5= 12-8.9=
3.2÷0.8= 4.01÷100= 1.7×0.5= 2.5×400= 13÷0.001=
3.2×50= 4.6+2.9= 0.47+1.8= 299+324= 0.6÷5=
6.7-2.9= 23×2.7+77×2.7= 5.4+0.74+4.6=
分析:本题根据小数的加法,减法,乘法,除法的运算法则计算即可;
12-8.9、4.6+2.9、299+324、6.7-2.9可用凑整法计算;
23×2.7+77×2.7可根据乘法分配律计算;
5.4+0.74+4.6可根据加法交换律计算.
解答:解:
1÷0.5=2, 5÷40=0.125, 2.4×3=7.2, 0.8×0.5=0.4, 12-8.9=3.1,
3.2÷0.8=4, 4.01÷100=0.0401, 1.7×0.5=0.85, 2.5×400=1000, 13÷0.001=13000,
3.2×50=160, 4.6+2.9=7.5, 0.47+1.8=2.27, 299+324=623, 0.6÷5=0.12,
6.7-2.9=3.8, 23×2.7+77×2.7=270, 5.4+0.74+4.6=10.74.
点评:完成本题要细心分析式中数据,然后快速准确得出答案.
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4.7+2.3=4.5×2=6.9-2.5=7.2×0.8=
6×3.4=0.62-0.32=1.4×0.5=0.75×100=
0.02×0.5=3.6÷0.3=6.3÷7=5.6÷100=
0.75÷0.25=0.125×8=4.8÷0.3=0.96÷2=
0.56÷28=0.36÷0.4=0.64÷0.8=0.72÷3.6=
3.6÷24=0.8×1.1=7.2+12.8=46.7-3.8=
12.8÷4=5.2÷13=12.5÷5=1.64÷41=
10÷20=24÷15=8.65×10=0.35×0.6=
3.08×0.01=4.95×1000=6.9×0.1=0.4×0.5=
2.4÷0.8=10.8÷9=9.6÷0.8=0.108÷2=
4.95÷0.9=9.65÷0.1=0.325×100=2.5×8=
0.56÷0.7=0.125×4=3.28×0.1=3.9÷0.13=
7.2×0.1=0.01×0.1=0.25×0.4=1.6÷0.8=
1÷2.5=1.25×0.8=3.2÷0.04=0÷1.7=
0.22×102=9.6÷0.8=5×0.24=4.5-0.05=
3.9÷0.1316.5÷0.5=5×0.12=24×0.5=
4.8×0.5=2.8+4.2=0.84÷2.1=5÷0.25=
7.8÷0.01=5.4÷0.6=3.2÷5=7×0.62=
0.56÷0.8=7.4-2.8=0.18÷0.2=0.16÷8=
4.5×0.02=8+7.2=1.2×30=0.012×0.2=
7.3×0.3=9÷6=3.6÷0.12=7.8÷0.6=
2÷5=4.5+5=0.3÷0.6=0.96÷0.2=
10.5×0.4=7.3+0.27=8×0.125=0.54÷0.6=
0.61+0.39=0.56÷28=10÷20=4.08÷0.4=
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2.3×100=0.75×100=0.108÷2=10.8÷9=
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84÷0.21=0.75÷0.25=2.5×16=0.108÷2=
1.75+32.5=16-5.07=5.2÷13=1.64÷41=
1.02×0.2=0.26×0.3=8.4×0.02=1.29×6=
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1.24÷4=3.27+0.63=5.02×0.3=0.3×0.5=
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0.48÷0.04=1.25÷2.5=5.5+55=16.8÷8=
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0.27÷0.3=2.5×101=0.65×101-0.65=2.6×7÷2.6×7=

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