总述：本次共解1题。其中
           ☆算术计算1题

〖1/1算式〗
    作业：求算式 149.987×8.308+250.100×5.308+321.875×0.852+56.945×0.45-378.058×4.56-106.283×0.786 的值.
    题型：数学计算
    解:
          149.987×8.308+250.100×5.308+321.875×0.852+56.945×0.45-378.058×4.56-106.283×0.786
        =1246.091996+250.1×5.308+321.875×0.852+56.945×0.45-378.058×4.56-106.283×0.786
        =1246.091996+1327.5308+321.875×0.852+56.945×0.45-378.058×4.56-106.283×0.786
        =1246.091996+1327.5308+274.2375+56.945×0.45-378.058×4.56-106.283×0.786
        =1246.091996+1327.5308+274.2375+25.62525-378.058×4.56-106.283×0.786
        =1246.091996+1327.5308+274.2375+25.62525-1723.94448-106.283×0.786
        =1246.091996+1327.5308+274.2375+25.62525-1723.94448-83.538438
        =2573.622796+274.2375+25.62525-1723.94448-83.538438
        =2847.860296+25.62525-1723.94448-83.538438
        =2873.485546-1723.94448-83.538438
        =1149.541066-83.538438
        =1066.002628
    答案:149.987×8.308+250.100×5.308+321.875×0.852+56.945×0.45-378.058×4.56-106.283×0.786=1066.002628

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