题目内容

直接写出得数.
12.4+2.1=
0.08×0.5=0.14÷0.02=2.5+0.2×2=
9.5×100=1.25×8=1÷4=0.25×0.9×4=
3.5-1.5=1.2÷0.4=3.6×0.5=8×0.9+8×2.1=
6.3÷0.09=2.9×0.3=0.95÷5=7.8+2.2-1.5=
1.6×0.25=0.1÷0.5=3.5×2×0.1=2.1÷0.2÷3.5=

解:
12.4+2.1=14.50.08×0.5=0.040.14÷0.02=72.5+0.2×2=2.9
9.5×100=9501.25×8=101÷4=0.250.25×0.9×4=0.9
3.5-1.5=21.2÷0.4=33.6×0.5=1.88×0.9+8×2.1=24
6.3÷0.09=702.9×0.3=0.870.95÷5=0.197.8+2.2-1.5=8.5
1.6×0.25=0.40.1÷0.5=0.23.5×2×0.1=0.72.1÷0.2÷3.5=3

分析:本题根据小数加、减、乘、除及四则混合运算的运算法则计算即可.
点评:完成本题要注意分析式中数据,能简算的要简算.
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