| 25+37= | 21.7÷7= |  = |  = |
| 70-34= | 12.3+=1.23= |  = |  = |
| 1.3+27= | 1.05÷0.5= | 6÷ = |  = |
| 45-0.5= |  = |  = |  = |
| 25×0.4= |  = |  = |  = |
| 25+37=62 | 21.7÷7=3.1 | = | =20 |
| 70-34=36 | 12.3+=1.23=13.53 | = | = |
| 1.3+27=28.3 | 1.05÷0.5=2.1 | 6÷=16 | = |
| 45-0.5=44.5 | = | = | = |
| 25×0.4=10 | = | =7 | = |
分析：直接利用小数、分数的计算法则进行口算．
点评：此题主要考查小数、分数四则运算的口算能力．