How to calculate the five fingers

The method of calculating the numbers in the palm of your hand is to use the five fingers of your left hand as the digital dial, each finger represents a number, and the little finger, ring finger, middle finger, index finger and thumb can represent five numbers respectively.

The number 9 on each finger, first of all, there are three joints on the finger. From top to bottom, the left side in the middle of the first joint represents 1, the left side in the middle of the second joint represents 2, and the left side in the middle of the third joint represents 3. From 3 down to the palm of your hand represents 4, the upper end of your finger represents 5, and the pulp of your finger represents 6. There are three stripes on your finger. From top to bottom, the first one stands for 7, and the second one stands for 8.

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. Think of your left hand as a five-gear abacus, and point to it with your right hand to calculate. When counting, point the fingers of your left hand with the fingers of your right hand.

Its clear division of labor is: right thumb points left thumb, right index finger points left index finger, right middle finger points left middle finger, right ring finger points left ring finger, and right little finger points left 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. Without any calculation tools and programs, you can know the answer number only by gently closing your hands, and you can perform four operations of addition, subtraction, multiplication and division of any number within100000.

Extended data:

1, advantages: calculation is always done by hand or with the help of other calculators (such as abacus, computer, etc.). ), and every normal person's hand is also a perfect calculator;

You can manually perform six operations of adding, subtracting, multiplying, dividing, squaring and squaring multiple numbers, and its operation speed (of course, it takes a long time to practice) is comparable to that of electronic computers. Multiplication and division are faster than abacus calculation, and the sum of squares is much faster than pen calculation.

2. Disadvantages: There are limitations, some figures cannot be calculated in this way, and it is difficult to remember the position clearly and it is not convenient to remember.