Exercise yourself consciously in life, such as looking at a license plate number, dividing or taking it.

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Quick heart is a teaching mode that is really synchronized with primary school mathematics textbooks: 1. Learning algorithm-written arithmetic training. At present, China's education system is exam-oriented education, and the standard for testing students is exam transcripts. Then the students' main tasks are to take exams, answer questions, write with a pen, and the training of calculating with a pen is the main line of teaching. Consistent with the mathematical calculation method in primary schools, it does not use any physical calculation, and can be used freely horizontally and vertically, even adding and subtracting. Computing with a pen is the golden key to opening an intelligent express train. 2. Clear the math-math battle. Being able to write questions with a pen not only helps children understand arithmetic, but also helps them understand it. Let children understand the calculation principle and break through the calculation of numbers in spelling. The child completes the calculation on the basis of understanding. 3. Practice speed-speed training, it is far from enough to use a pen to calculate problems. There should be a time limit for oral calculation in primary schools. It takes time to tell whether it is up to standard, that is, there are not enough calculation problems, mainly to speed up. 4. Enlightenment wisdom-intellectual gymnastics is not a simple study and calculation, but focuses on cultivating children's mathematical thinking ability, fully stimulating the potential of the left and right brains and developing the whole brain. After rapid mental arithmetic training, preschool children can deeply understand the essence of mathematics (including), the meaning of numbers (cardinal number, ordinal number, including), the operation mechanism of numbers (addition and subtraction of numbers with the same number) and the way of mathematical logic operation, so that children can master the method of dealing with complex information decomposition and develop divergent thinking and reverse thinking. The child's brain works fast. Historical Harvest Speed Algorithm: a quick calculation method invented by Shi Fengshou, a quick calculation master, after 10 years of research. It is a method of calculating directly with the brain, also known as quick mental arithmetic and quick mental arithmetic. This method breaks the traditional method of counting from the low position for thousands of years, and summarizes 26 formulas by using the carry rule. Counting from the high position and counting with the help of fingers can speed up the calculation, which can instantly calculate the correct results, help human beings develop their brain power and strengthen their ability to think, analyze, judge and solve problems. It is a great pioneering work of contemporary applied mathematics. This set of calculation method, officially named "Fast Algorithm of Historical Harvest" by the state in 1990, has been incorporated into the mathematics textbook of modern primary schools in China's nine-year compulsory education. UNESCO praised it as a miracle in the history of educational science and should be popularized all over the world. The main features of the historical harvest speed algorithm are as follows: ⊙ Starting from a high position, from left to right ⊙ No calculation tools ⊙ No calculation program ⊙ Directly reporting the correct answer when you see the formula ⊙ It can be applied to the operations of addition, subtraction, multiplication and division of multi-bit data, and examples of exercises in mathematical operations such as power, root, trigonometric function and logarithm-examples of fast calculation in practice ○ Fast algorithm of historical harvest. The algorithm starts with high digits and memorizes 26 formulas summarized by the professor of history (these formulas do not need to be memorized, but they conform to scientific laws and are interrelated). Used to express the carry rule of multiplying one digit by multiple digits. If you master these formulas and some specific rules, you can quickly perform operations such as addition, subtraction, multiplication, division, power, root, fraction, function and logarithm. In this paper, an example of multiplication shows that the zero-speed algorithm, like the traditional multiplication, needs to deal with each bit of the multiplier bit by bit. We call the number being processed in the multiplicand "standard", and the number from the first digit to the last digit on the right side of the standard is called "last digit". After the standard is multiplied, only the single digit of the product is taken as "this bit", and the number to be carried after the standard is multiplied by the multiplier is "the last bit". ○ Every bit of the product is a single digit of the sum of "Ben plus Backward", that is, the single digit of the sum of-□ standard product = (Ben plus Backward) ○ Then when we calculate, we must find out Ben and Backward one by one from left to right, and then add them to get its single digits. Now, let's give a correct example to illustrate the thinking activity in calculus. (Example) The first digit of the multiplicand is supplemented by 0, and the formula is as follows: 0847536×2= 1695072. The carry rule of the multiplier of 2 is "2 is full of 5 1", 0× 2 is a 0, the last digit is 8, and the last digit is 1, 1 8×2 is a 6. 8 ten 1 gets 9 7×2 original 4, the last digit 5, full 5 1, forty 1 gets 5 5×2 original 0, and the last digit 3 doesn't enter, so it gets 0 3×2 original 6, and the last digit 6, full 5 1, 60/. Based on these carry rules, a "historical harvest fast algorithm" is gradually developed. As long as it is skillfully used, the purpose of calculating four multi-digit operations quickly and accurately can be achieved.

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