口算1.2÷0.2=2.5×4=0.25+4=1.87×0=3.5+0.5=1.2÷0.4=3.6÷4=0÷1.25=0.12×6=0.64×0.03=5.8+4.2

口算
1.2÷0.2=2.5×4=0.25+4=1.87×0=3.5+0.5=1.2÷0.4=3.6÷4=0÷1.25=0.12×6=0.64×0.03=5.8+4.2-6.5=7.8÷3=0.125×8=2.8÷1.4=0.25÷0.5=7.21÷7=0.35÷10=3.6÷3=6.3÷0.9=0.54÷6=0.3×0.1=1.3÷2=0.4÷8=27.3÷3=0.51÷0.3=15÷0.01=5÷10=0.7×12=0.2×0.5=3.8×0.1=0.2×0.2=0.04×0.4=12.4+7.6=8×0.5=0.72÷36=9×2.5+2.5=1.8÷3=2.3÷2=6.5÷5=2.14÷2=2.5×4=2.7×2=0.5×7=4.8+3.6+5.2=3.4÷1.7=2.5+0.2=4.5÷5=5+2.8=0.8×0.3=13.5×2×0=5.25÷5=4×2.2=0.12×0.5=1.8×5=6.24÷2=2.83-1.43=1.2+2.9=3.8÷2=1.32×3=4.6×7=

解：1.2÷0.2=62.5×4=100.25+4=4.251.87×0=03.5+0.5=41.2÷0.4=33.6÷4=0.90÷1.25=00.12×6=0.720.64×0.03=0.01925.8+4.2-6.5=3.57.8÷3=2.60.125×8=12.8÷1.4=20.25÷0.5=0.57.21÷7=1.030.35÷10=0.0353.6÷3=1.26.3÷0.9=70.54÷6=0.090.3×0.1=0.031.3÷2=0.650.4÷8=0.057.3÷3=2.433…0.51÷0.3=1.715÷0.01=15005÷10=0.50.7×12=8.40.2×0.5=0.013.8×0.1=0.380.2×0.2=0.040.04×0.4=0.01612.4+7.6=208×0.5=40.72÷36=0.029×2.5+2.5=251.8÷3=0.62.3÷2=1.156.5÷5=1.32.14÷2=1.072.5×4=102.7×2=5.40.5×7=3.54.8+3.6+5.2=13.63.4÷1.7=22.5+0.2=2.74.5÷5=0.95+2.8=7.80.8×0.3=0.2413.5×2×0=05.25÷5=1.054×2.2=8.80.12×0.5=0.061.8×5=96.24÷2=3.122.83-1.43=1.41.2+2.9=4.13.8÷2=1.91.32×3=3.964.6×7=32.2解析分析：运用小数四则运算的计算法则直接计算即可．点评：此题考查学生的计算能力，计算时要细心，同时注意个别题使用运算定律可以进行简算．

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