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Why Top-down Calculation Less Efficient Than A Bottom-up Calculation? Being Less Efficient, Why Do We Use Them ?

Answer»

In the PROCESS it calculates more blocks than is NECESSARY. SOMETIMES it is necessary to PERFORM top-down calculation to get the correct calculation results.

In the process it calculates more blocks than is necessary. Sometimes it is necessary to perform top-down calculation to get the correct calculation results.



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