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=
11-9.4=0.8×0.11=0.72+12.8=5.6÷0.01=
2.3×100=0.75×100=0.108÷2=10.8÷9=
0.7÷0.8=16-5.07=4.2×0.4=0.72×6=
12÷0.5=5.2×0.4=12.2÷0.2=5.6÷100=
0.41+3.7=0.02×0.5=7.2-0.8=1.4×0.5=
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=
0.8×0.05=12.6÷0.03=8.71÷0.1=21÷0.21=
0.8×0.13=0.34÷17=8.08÷0.4=0.5×2.2=
1.24÷4=3.27+0.63=5.02×0.3=0.3×0.5=
6.4÷4=7.2÷1.8=0.7÷0.35=0.72÷1.44=
0.48÷0.04=1.25÷2.5=5.5+55=16.8÷8=
0.54+2.2=3.5-0.05=2÷0.02=0.25×40=
1.5×0.6=0.32÷0.8=12.25÷0.5=73.5×0.1=
46.5+52.5=0.45×102=1.25×88=2.64+3.85+1.54=
8×1.25=5.6÷3.5=4.2÷0.7÷6=0.4×8.6×25=
0.27÷0.3=2.5×101=0.65×101-0.65=2.6×7÷2.6×7=

解:4.7+2.3=74.5×2=96.9-2.5=4.47.2×0.8=5.76
6×3.4=20.40.62-0.32=0.31.4×0.5=0.70.75×100=75
0.02×0.5=0.013.6÷0.3=126.3÷7=0.95.6÷100=0.056
0.75÷0.25=30.125×8=14.8÷0.3=160.96÷2=0.48
0.56÷28=0.020.36÷0.4=0.90.64÷0.8=0.80.72÷3.6=0.2
3.6÷24=0.150.8×1.1=0.887.2+12.8=2046.7-3.8=42.9
12.8÷4=3.25.2÷13=0.412.5÷5=2.51.64÷41=0.04
10÷20=0.524÷15=1.68.65×10=86.50.35×0.6=0.21
3.08×0.01=0.03084.95×1000=49506.9×0.1=0.690.4×0.5=0.2
2.4÷0.8=310.8÷9=1.29.6÷0.8=120.108÷2=0.054
4.95÷0.9=5.59.65÷0.1=96.50.325×100=32.52.5×8=20
0.56÷0.7=0.80.125×4=0.53.28×0.1=0.3283.9÷0.13=30
7.2×0.1=0.720.01×0.1=0.0010.25×0.4=0.11.6÷0.8=2
1÷2.5=0.41.25×0.8=13.2÷0.04=800÷1.7=0
0.22×102=22.449.6÷0.8=125×0.24=1.24.5-0.05=4.45
3.9÷0.13=3016.5÷0.5=335×0.12=0.624×0.5=12
4.8×0.5=2.42.8+4.2=70.84÷2.1=0.45÷0.25=20
7.8÷0.01=7805.4÷0.6=93.2÷5=0.647×0.62=4.34
0.56÷0.8=0.77.4-2.8=4.60.18÷0.2=0.90.16÷8=0.02
4.5×0.02=0.098+7.2=15.21.2×30=360.012×0.2=0.0024
7.3×0.3=2.199÷6=1.53.6÷0.12=307.8÷0.6=13
2÷5=0.44.5+5=9.50.3÷0.6=0.50.96÷0.2=4.8
10.5×0.4=4.27.3+0.27=7.578×0.125=10.54÷0.6=0.9
0.61+0.39=10.56÷28=0.0210÷20=0.54.08÷0.4=10.2
11-9.4=1.60.8×0.11=0.0880.72+12.8=13.525.6÷0.01=560
2.3×100=2300.75×100=750.108÷2=0.05410.8÷9=1.2
0.7÷0.8=0.87516-5.07=10.934.2×0.4=1.680.72×6=4.32
12÷0.5=245.2×0.4=2.0812.2÷0.2=615.6÷100=0.056
0.41+3.7=4.110.02×0.5=0.017.2-0.8=6.41.4×0.5=0.7
84÷0.21=4000.75÷0.25=32.5×16=400.108÷2=0.054
1.75+32.5=34.2516-5.07=10.935.2÷13=0.41.64÷41=0.04
1.02×0.2=0.2040.26×0.3=0.0788.4×0.02=0.1681.29×6=7.74
0.8×0.05=0.0412.6÷0.03=4208.71÷0.1=87.121÷0.21=100
0.8×0.13=0.1040.34÷17=0.028.08÷0.4=20.20.5×2.2=1.1
1.24÷4=0.313.27+0.63=3.95.02×0.3=1.5060.3×0.5=0.15
6.4÷4=1.67.2÷1.8=40.7÷0.35=20.72÷1.44=0.5
0.48÷0.04=121.25÷2.5=0.55.5+55=60.516.8÷8=2.1
0.54+2.2=2.743.5-0.05=3.452÷0.02=1000.25×40=10
1.5×0.6=0.90.32÷0.8=0.412.25÷0.5=24.573.5×0.1=7.35
46.5+52.5=990.45×102=45.91.25×88=1102.64+3.85+1.54=8.03
8×1.25=105.6÷3.5=1.64.2÷0.7÷6=10.4×8.6×25=8.6
0.27÷0.3=0.92.5×101=252.50.65×101-0.65=652.6×7÷2.6×7=49

分析:根據(jù)小數(shù)四則混合運算的順序計算,大多是口算較簡單.
點評:此題主要考查了學(xué)生的口算能力.
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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÷0.13 16.5÷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=
11-9.4= 0.8×0.11= 0.72+12.8= 5.6÷0.01=
2.3×100= 0.75×100= 0.108÷2= 10.8÷9=
0.7÷0.8= 16-5.07= 4.2×0.4= 0.72×6=
12÷0.5= 5.2×0.4= 12.2÷0.2= 5.6÷100=
0.41+3.7= 0.02×0.5= 7.2-0.8= 1.4×0.5=
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=
0.8×0.05= 12.6÷0.03= 8.71÷0.1= 21÷0.21=
0.8×0.13= 0.34÷17= 8.08÷0.4= 0.5×2.2=
1.24÷4= 3.27+0.63= 5.02×0.3= 0.3×0.5=
6.4÷4= 7.2÷1.8= 0.7÷0.35= 0.72÷1.44=
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