The calculation is as follows:

5-2=3;

96÷3=32;

So I sold 32 pieces.

The relationship between operators and operators

1) the relationship between the whole and the elements. Set data, such as matrix, is added to the element addition from the matrix to realize the processing of set elements. The same operator can produce different calculation effects on different data (such as overloading and polymorphism in C++ language). ).

2) Higher-order operators, often the combination of lower-order operators, form a sequence with new operators, such as the limit calculation of integral: series, which makes the calculation of complex data elements possible.

In the calculation, we can use two reversible calculation processes to simplify the higher-order calculation. For example, for a complex multiple multiplication formula, the logarithm can be changed into addition calculation, and then recovered by exponent. This is a process from high to low.