一、计算。
  ① X÷0.07=1.4                    ②    3.7+6.3×3.7+2.7×3.7                                   
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二、计算图形的面积

2、工厂有一批煤，原计划每天烧0.25吨,可烧120天.实际每天烧0.2吨,这样将比原计划多烧多少天?                                                                                                            
分析:  要求比原计划多烧多少天? 必需要知道哪两个条件。
                                                                          
从已知条件可以推出：
                            

最后列综合算式：                            
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                           答：                       。