题目内容
| 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=4.5 | 2.5×4=10 | 0÷0.9=0 | 4÷0.2=20 |
| 0.56÷0.7=0.8 | 0.24×5=1.2 | 0.2×5=1 | 2.1-0.87=1.23 |
| 3.54-3.5=0.04 | 3.4-1.5=1.9 | 12÷0.6=20 | 8×0.125=1 |
| 0.7×11=7.7 | 0.13+1.7=1.83 | 3.15÷0.5=6.3 | 0.9÷4.5=0.2 |
| 0.2×0.3=0.06 | 1.2+0.56=1.76 | 3-1.7=1.3 | 1÷0.25=4 |
| 78÷1.3=60 | 15÷0.3=50 | 2.1+1.49=3.59 | 6.24-1.5=4.74 |
| 1.2×0.3=0.36 | 6.3÷6.3=1 | 1.6×0.2=0.32 | 3.7-1.2=2.5 |
| 4.58-3.5=1.08 | 72.8÷8=9.1 | 3.5×0.3=1.05 | 0.25×100=25 |
| 3.2-2=1.2 | 0.51÷17=0.03 | 5.3÷0.01=530 | 1.03×3=3.09 |
| 2.8+12=14.8 | 3.5×2=7 | 2.2×0.1=0.22 | 1-0.25=0.75 |
| 0.62-0.32=0.3 | 6.3÷0.21=30 | 1.7×10=17 | 0.12×3=0.36 |
| 0.45×2=0.9 | 1.2÷0.3=4 | 1÷2=0.5 | 4.8×100=480 |
| 0.25×8=2 | 0.89÷8.9=0.1 | 17.8+2.2=20 | 0.8÷0.2=4 |
| 5.79÷0.1=57.9 | 0.35+0.65=1 | 8.9-0.9=8 | 9.2-9.2=0 |
| 3.6÷0.4=9 | 15.15÷15=1.01 | 0.2×0.3×0.1=0.006 | 1.34×4×2.5=13.4 |
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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