3.2×0.2= 1.4×0.4= 3.3÷3= 1.2÷0.3= 0.56÷8=
2.5×0.4= 1.5×2= 0.7×7= 7.3+0.3= 1.23×3=
0.53-0.3= 1.8×0.5= 0.9×0.01= 0.23×3= 1.6÷0.04=
2-1.2= 7.8÷6= 8.4÷0.21= 8.4÷0.7= 1.23×3=
5.6+3.6= 9-2.35= 0.56÷8= 7.3+2.7= 4.8÷1.2=
5.6÷0.4= 4.5÷0.9= 8.1×2= 90÷3= 7.2÷0.9=
1.23+3= 5.6+1.23= 4.5×2= 5.6÷1.4= 6.6÷1.1=
2.1÷3= 0.6×0.5= 3.23×2= 1.8÷3= 7.2÷6=
12.5÷0.1= 0.32÷0.8= 1.6+3.7= 0.45×0.2= 4.8÷0.08=
0.36÷1.8= 0.4×0.5= 8.4+5.6= 8.4÷2.1= 1.8×0.4=
0.01×8= 7.31×100= 0.09×6= 0.8×0.6= 3+2.3=
1.25×8= 3÷5= 2.3+2.3= 6.23+3.6= 9.3÷3=
4.8÷0.8= 7.5-4.5= 5.7+4.3= 0.75÷15= 1÷0.25=
1.2×60= 6÷0.2= 0.21×4= 0.25×4×9= 2.33×1.2=
0.62÷0.62-1= 5+3.2÷0.8= 7.5÷2.5×0= 3.9×0.01= 0.001+10.099=
3-0.98= 6×0.25= 0.63÷0.9= 8.95÷0.895=
分析：根據(jù)小數(shù)加、減、乘、除法的計(jì)算法則，直接進(jìn)行口算即可．
解答：解：
3.2×0.2=0.64 1.4×0.4=0.56 3.3÷3=1.1 1.2÷0.3=4 0.56÷8=0.07
2.5×0.4=1 1.5×2=3 0.7×7=0.49 7.3+0.3=7.6 1.23×3=3.69
0.53-0.3=0.23 1.8×0.5=0.9 0.9×0.01=0.009 0.23×3=0.69 1.6÷0.04=40
2-1.2=0.8 7.8÷6=1.3 8.4÷0.21=40 8.4÷0.7=12 1.23×3=3.69
5.6+3.6=9.2 9-2.35=6.65 0.56÷8=0.07 7.3+2.7=10 4.8÷1.2=4
5.6÷0.4=14 4.5÷0.9=5 8.1×2=16.2 90÷3=30 7.2÷0.9=8
1.23+3=4.23 5.6+1.23=6.83 4.5×2=9 5.6÷1.4=4 6.6÷1.1=6
2.1÷3=0.7 0.6×0.5=0.3 3.23×2=6.46 1.8÷3=0.6 7.2÷6=1.2
12.5÷0.1=125 0.32÷0.8=0.4 1.6+3.7=5.3 0.45×0.2=0.09 4.8÷0.08=60
0.36÷1.8=0.2 0.4×0.5=0.2 8.4+5.6=14 8.4÷2.1=4 1.8×0.4=0.72
0.01×8=0.08 7.31×100=731 0.09×6=0.54 0.8×0.6=0.48 3+2.3=5.3
1.25×8=10 3÷5=0.6 2.3+2.3=4.6 6.23+3.6=9.83 9.3÷3=3.1
4.8÷0.8=6 7.5-4.5=3 5.7+4.3=10 0.75÷15=0.05 1÷0.25=4
1.2×60=72 6÷0.2=30 0.21×4=0.84 0.25×4×9=9 2.33×1.2=2.796
0.62÷0.62-1=0 5+3.2÷0.8=9 7.5÷2.5×0=0 3.9×0.01=0.039 0.001+10.099=10.1
3-0.98=2.02 6×0.25=1.5 0.63÷0.9=0.7 8.95÷0.895=10
點(diǎn)評(píng)：此題考查的目的是理解掌握小數(shù)四則運(yùn)算的計(jì)算法則，并且能夠正確熟練地進(jìn)行口算，提高口算能力．
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3.2×0.2             		 1.4×0.4           3.3÷3          1.2÷0.3
2.5×0.4             1.5×2            0.7×7           7.3+0.3
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（5）2-1.2               7.8÷6             8.4÷0.21         8.4÷0.7
5.6+3.6            9-2.35              0.56÷8         1.23×3
5.6÷0.4            4.5÷0.9            8.1×2          90÷3
1.23+3             5.6+1.23           4.5×2          5.6÷1.4
4.8÷1.2           7.2÷0.9           6.6÷1.1          7.2÷6
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0.36÷1.8          0.4×0.5            8.4+5.6         8.4÷2.1
4.8÷0.08          4.8÷0.8            3+2.3           9.3÷3
0.01×8           7.31×100          0.09×6         0.8×0.6
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