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    1.23÷3=0.8×11=1-0.75=
    1.7×0.4=0.36÷12=1.6+0.38=
    1.2÷0.3=0.75×4=15×0.4=
    2.14-0.9=4×0.25=10÷2.5=
    0.4×52=1.6×0.4=9.6÷6=
    4.3-0.4=7-6.2=0.86-0.3=
    8.8÷2.2=2.6÷0.2=0.15×3=
    0.9÷0.45=0.27÷3=0.51+1.7=
    0.6÷0.5=0.125×8=0.38×1000=
    6.8-1.7=2.4×0.2=32.8+19=
    0.56÷14=1÷0.05=6÷12=
    0.14×5=3×1.4=4.9÷0.7=
    0.4÷8=6.3+3.7=3.5×0.2=
    0.2×12.6×5=8.4÷4.2=2.4×0.5=
    0÷3.5×0.2=0×9.7+2.3=1.6×9+1.6=
    3.8+1.2=4.8÷0.3=530+270=
    7.6÷3.8=92÷2.3=9.6-1.6=
    7.2+2.8=2.63+0.37=0.67+1.24=
    0.3×101=
    		0.25×8=
    		16÷1.6=
    26.1-3.5-7.5=

    解：
    1.23÷3=0.410.8×11=8.81-0.75=0.25
    1.7×0.4=0.680.36÷12=0.031.6+0.38=1.98
    1.2÷0.3=40.75×4=315×0.4=6
    2.14-0.9=1.244×0.25=110÷2.5=4
    0.4×52=20.81.6×0.4=0.649.6÷6=1.6
    4.3-0.4=3.97-6.2=0.80.86-0.3=0.56
    8.8÷2.2=42.6÷0.2=130.15×3=0.45
    0.9÷0.45=20.27÷3=0.090.51+1.7=2.21
    0.6÷0.5=1.20.125×8=10.38×1000=380
    6.8-1.7=5.12.4×0.2=0.4832.8+19=51.8
    0.56÷14=0.041÷0.05=206÷12=0.5
    0.14×5=0.73×1.4=4.24.9÷0.7=7
    0.4÷8=0.56.3+3.7=103.5×0.2=0.7
    0.2×12.6×5=12.68.4÷4.2=22.4×0.5=1.2
    0÷3.5×0.2=00×9.7+2.3=2.31.6×9+1.6=16
    3.8+1.2=54.8÷0.3=16530+270=800
    7.6÷3.8=292÷2.3=409.6-1.6=8
    7.2+2.8=102.63+0.37=30.67+1.24=1.91
    0.3×101=30.30.25×8=216÷1.6=10
    26.1-3.5-7.5=15.1

    分析：根据小数的加减乘除及四则混合运算进行计算即可．
    点评：口算题目，要求快速准确，能用简便方法的要用简便方法．
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    1.23÷3= 0.8×11= 1-0.75=
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    科目：小学数学 来源： 题型：解答题

    180÷60=12×25=0÷90=
    4×5÷4×5=0.25×4+4=131+218+269+182=
    25×6×4=420÷35=36×5×4=
    120÷5÷3=198-75-25=120-20÷5=
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