问题 计算题
脱式计算。                                                                               
(1)205×3×3 (2)480×5+200(3)124×3×2
(4)2×438×4(5)116×3+184(6)250×2×3
答案

 

(1)205×3×3 
        =615×3
        =1845(2)480×5+200
        =2400+200
        =2600(3)124×3×2
        =372×2
        =744
(4)2×438×4
       =876×4
       =3504(5)116×3+184
        =348+184

        =532(6)250×2×3

        =500×3

        =1500

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