简算:0.25×4.78×40.65×2011.2×2.5+0.8×2.54.8×0.256.53÷0.4÷2.51.8×20.1.

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简算:
0.25×4.78×40.65×2011.2×2.5+0.8×2.5
4.8×0.256.53÷0.4÷2.51.8×20.1.

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答案解析

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  • (1)0.25×4.78×4,
    =(0.25×4)×4.78,
    =1×4.78,
    =4.78;(2)0.65×201,
    =0.65×(200+1),
    =0.65×100+0.65×1,
    =130+0.65,
    =130.65;(3)1.2×2.5+0.8×2.5,
    =(1.2+0.8)×2.5,
    =2×2.5,
    =5;(4)4.8×0.25,
    =1.2×4×0.25,
    =1.2×(4×0.25),
    =1.2×1,
    =1.2;(5)6.53÷0.4÷2.5,
    =6.53÷(0.4×2.5),
    =6.53÷1,
    =6.53;(6)1.8×20.1,
    =1.8×(20+0.1),
    =1.8×20+1.8×0.1,
    =36+0.18,
    =36.18.