3×1.5=2.5×4=0÷0.9=4÷0.2=0.56÷0.7=0.24×5=0.2×5=2.1-0.87=3.54-3.5=3.4-1.5=12÷0.6=8×0.

3×1.5=2.5×4=0÷0.9=4÷0.2=0.56÷0.7=0.24×5=0.2×5=2.1-0.87=3.54-3.5=3.4-1.5=12÷0.6=8×0.125=0.7×11=0.13+1.7=3.15÷0.5=0.9÷4.5=0.2×0.3=1.2+0.56=3-1.7=1÷0.25=78÷1.3=15÷0.3=2.1+1.49=6.24-1.5=1.2×0.3=6.3÷6.3=1.6×0.2=3.7-1.2=4.58-3.5=72.8÷8=3.5×0.3=0.25×100=3.2-2=0.51÷17=5.3÷0.01=1.03×3=2.8+12=3.5×2=2.2×0.1=1-0.25=0.62-0.32=6.3÷0.21=1.7×10=0.12×3=0.45×2=1.2÷0.3=1÷2=4.8×100=0.25×8=0.89÷8.9=17.8+2.2=0.8÷0.2=5.79÷0.1=0.35+0.65=8.9-0.9=9.2-9.2=3.6÷0.4=15.15÷15=0.2×0.3×0.1=1.34×4×2.5=

解：3×1.5=4.52.5×4=100÷0.9=04÷0.2=200.56÷0.7=0.80.24×5=1.20.2×5=12.1-0.87=1.233.54-3.5=0.043.4-1.5=1.912÷0.6=208×0.125=10.7×11=7.70.13+1.7=1.833.15÷0.5=6.30.9÷4.5=0.20.2×0.3=0.061.2+0.56=1.763-1.7=1.31÷0.25=478÷1.3=6015÷0.3=502.1+1.49=3.596.24-1.5=4.741.2×0.3=0.366.3÷6.3=11.6×0.2=0.323.7-1.2=2.54.58-3.5=1.0872.8÷8=9.13.5×0.3=1.050.25×100=253.2-2=1.20.51÷17=0.035.3÷0.01=5301.03×3=3.092.8+12=14.83.5×2=72.2×0.1=0.221-0.25=0.750.62-0.32=0.36.3÷0.21=301.7×10=170.12×3=0.360.45×2=0.91.2÷0.3=41÷2=0.54.8×100=4800.25×8=20.89÷8.9=0.117.8+2.2=200.8÷0.2=45.79÷0.1=57.90.35+0.65=18.9-0.9=89.2-9.2=03.6÷0.4=915.15÷15=1.010.2×0.3×0.1=0.0061.34×4×2.5=13.4解析分析：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．

这个问题我还想问问老师呢