1, people will tie a knot on the rope from right to left in turn to record the days after the child is born. In addition, Chip's knots seem complicated, but actually only three kinds of knots are used: decimal single knot, single digit long knot and single eight-character knot.
2. Knot counting is to count the number of objects by tying knots. Legend has it that when the ancient king went to war, he tied a knot on a rope to count the days because there was no calendar. When all the knots used on the rope are opened, the war will be over.
People in ancient times also invented many other methods, such as marking bones with sharp tools to calculate numbers. The knot number method is the most convenient and feasible, so it has become a widely used method.
Knot counting related knowledge is as follows:
1, the number of knots is an ancient calculation method, which originated in ancient times. Before people invented numbers and arithmetic, they used knots on ropes to represent numbers. This method has appeared in many primitive tribes, such as Inca civilization in South America and Masai people in Africa. The principle of knot number is to divide the rope into several sections, and each section represents a basic unit.
2. Then tie a knot on the rope to represent different numbers of basic units. The basic unit of knot counting can be anything, such as stones, shells, fruits, etc. Before you start counting, you must first determine a basic unit, and then divide the rope into sections equal to the basic unit. For example, if the basic unit is stone, the rope can be divided into 10 segments.
3. Each paragraph represents a stone. Next, different numbers of basic units are represented by tying knots on the rope. For example, if you want to represent two stones, you can tie two knots on the rope; If you want to represent five stone heads, you can tie five knots on the rope. Knot counting is simple and intuitive, which is suitable for primitive society without knowledge of words and arithmetic.