Finger speed algorithm, also called palm calculation, is a mathematical operation method without abacus. For a long time, people always calculate by hand or with the help of other calculators (such as abacus and computer). In fact, every normal person's hand is also a perfect calculator. He can use the palm of his hand to perform six operations of adding, subtracting, multiplying, dividing, squaring, etc. The operation speed (after a certain period of practice, of course) can be comparable to that of an electronic computer, and the ratio of multiplication and division can be comparable to it.

The finger speed algorithm-palm calculation-represents numbers by using five fingers of the left hand as the number dial, each finger represents a number, and five fingers can represent five numbers.

The number on each finger is 9. First, we see three joints on our fingers. From top to bottom, the left side of the first joint stands for 1, the left side of the second joint stands for 2, and the left side of the third joint stands for 3. From 3 to 4, the upper end of the finger stands for 5, the pulp of the finger stands for 6, and there are three horizontal bars on the palm. From top to bottom, the first bar represents 7 and the second bar represents 7.

Finger speed algorithm. The calculation method of palm calculation is a method to reproduce the calculation process by using brain images and mental arithmetic, and get the results. It regards the left hand as a five-gear abacus, and uses the right hand to count according to this abacus. When counting, point the fingers of your left hand with the fingers of your right hand. Its clear division of labor is: right thumb/left thumb, right index finger, left middle finger, right ring finger, left ring finger and right little finger. The corresponding professional division of labor does not interfere with each other. Which finger is clicked, which finger is extended, and which finger is not clicked, bending, indicating 0. It doesn't need any calculation tools, and it doesn't list arithmetic programs. It only needs to close two hands gently to know the answer number, and can perform four operations of addition, subtraction, multiplication and division of any number within 100 thousand.

Finger speed algorithm, palm calculation-reduce the complicated calculation process of pen calculation formula, save time and effort, and improve the calculation speed of students.