Ask for answers, talk about arithmetic. What is arithmetic .

Meaning. What is arithmetic? As the name suggests, arithmetic is the truth in the calculation process, which refers to the way of thinking in the calculation process.

It is to solve the problem of why it is counted this way. For example, when calculating 214+35, it is calculated according to the composition of numbers: 214 is composed of 2 hundreds, 1 ten and 4 ones, and 35 is composed of 3 tens and 5 ones, so first add 4 ones and 5 ones to 9 ones, then add 1 ten and 3 tens to get 4 tens, and finally merge 2 hundreds, 4 tens and 9 ones to get 249, which is the arithmetic.

Relationship with algorithms.

When the students have done a certain amount of practice to get old, they have discovered the rules of calculation: single digits can only be directly added to single digits, tens can only be directly added to tens of digits, hundreds can only be directly added to hundreds of digits, that is, the numbers on the same number can be added directly, and finally several numbers are combined, which is the process of students' understanding of arithmetic; Finally, the optimization calculation process is carried out, in order to facilitate the calculation is generally written in the vertical form, on this basis, students are guided to abstractly summarize the universally applicable calculation rules: align the same digits to list the vertical form, and then add from the single digit, and advance the full ten to the previous one, which is the algorithm.

From the above analysis, it can be seen that arithmetic and algorithm have these relationships: arithmetic is an objective law, but algorithm is an artificially prescribed operation method; The arithmetic provides a correct way of thinking for the calculation, ensures the rationality and correctness of the calculation, and the algorithm provides a quick operation method for the calculation, which improves the lead content of the calculation. Arithmetic is the theoretical basis of the algorithm, the algorithm is the refinement and generalization of the arithmetic, the algorithm must be based on the arithmetic as the premise, the arithmetic must be optimized by the algorithm, and they are complementary to each other.

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The meaning of arithmetic.

What is arithmetic? As the name suggests, arithmetic is the truth in the calculation process, which refers to the way of thinking in the calculation process.

It is to solve the problem of why it is counted this way. For example, when calculating 214+35, it is calculated according to the composition of numbers: 214 is composed of 2 hundreds, 1 ten and 4 ones, and 35 is composed of 3 tens and 5 huhe, so first add 4 ones and 5 ones to 9 ones, then add 1 ten and 3 tens to get 4 tens, and finally merge 2 hundreds, 4 tens and 9 ones to get 249, which is the arithmetic.

Let the side length of the square be a, then 10*8 2-a square = (10-a)*(8-a), the solution is a = 4 or 5, 4 does not fit the topic, so a is 5, so the shadow area is 15

Definition: governance, acting; accounting, calculation; Trial; Liquidation.

Pronunciation: lǐ suàn

Sentence formation: 1The truth of a lawyer is not the truth, but a kind of opportunistic measure that is reasonable and self-interested.

2.Decision tree learning is one of the most widely used inductive reasoning algorithms.

3.For general average adjustment, the adjustment rules agreed upon by the parties shall apply.

4.The facet division and its approximation methods are also discussed, and the occlusion processing algorithm is analyzed.

5.The algorithm is an active queue management algorithm based on cybernetics, which has the characteristics of small queue length jitter.

It is generally calculated using a set of formulas.