How to recite the ninety nine multiplication formula? What is the ninety nine multiplication formula

Vertical recitation: This method has a rule, the number of vertical columns, gradually increase a few, can be according to this law to help memory.

Horizontal recitation: This method also has a rule, the first few lines, the next sentence is a few more than the previous sentence.

Turning and reciting: One of the characteristics of this kind of recitation is that there are nine sentences in the mantra from one to nine, and the mantra of several gradually increases.

To form a long-term memory, you can memorize two ten-minute sessions a day (divide the daytime into two periods of ten minutes each), and randomly select a recitation time period, and write silently on paper while memorizing, which can deepen the long-term memory.

When reciting, you need to learn to understand without memorizing (e.g., five-five-twenty-five, which is the sum of five fives equals twenty-five). Also be proficient in making use of the mantra's surrounding relationships (e.g

Six, seven, forty-two, forty-two plus a seven equals forty-nine, forty-two minus six equals thirty-six, etc.)

Memorize them all and copy them repeatedly, and memorize them every day and copy them every day.

Here's how to memorize the ninety-nine multiplication formula:

First, it is best to recite the multiplication formula vertically, school teachers generally let children back horizontally, we from the beginning, no matter which number multiplied by one is equal to the original number, then the first nine children are not a problem, one by one.

One, one, two, two, until nineteen, nine.

Second, then we start with two, two times how many are equivalent to the addition of two of these numbers, then the addition of children have learned, I believe that the average child is not a problem, one or two get two, two two get four until two ninety-eight, so that we have learned the first seventeen, give the child time to consolidate the first seventeen memorized.

Third, in the next three, we can tell the child that three times how many is equal to two times how many and then add a number, because the previous child has memorized the content of two times a few, and can deduce the number of three times a few, and then multiply three times a few memorized, and so on children can quickly master the ninety-nine multiplication formula.

Mantra development. China used the "ninety-nine formula" earlier. In books such as "Xunzi", "Guanzi", "Huainanzi", and "Warring States Policy", you can find sentences such as "three nine twenty-seven", "six eight forty-eight", "four eight thirty-two", "six six thirty-six" and so on.

It can be seen that as early as the "Spring and Autumn Period" and "Warring States", "Ninety-Nine Multiplication Songs" has begun to become popular.

The ninety-nine table, also known as the ninety-nine song and the nine-cause song, is the basic calculation rule in multiplication, division, square and other operations in ancient Chinese calculations, which has been used to this day for more than 2,000 years. Students in the early grades of elementary school and some school-age children can memorize it. However, Europe did not know such simple multiplication tables until the beginning of the thirteenth century.

Learning is an uninterrupted process, and no matter how good the method is, it needs to be practiced continuously, so on the basis of good methods, it is also necessary to cultivate the habit of memorizing more and studying diligently

The multiplication formula table is a simple multiplication table that starts from "one by one to get one" and ends with "ninety-nine eighty-one", which is derived from the multiplication formula and is convenient for multiplication calculation.

Vertical back: For example, ,—— gets one, one or two gets two, and then recite it until it gets nineteen, then it gets four for two and two, and then it gets six for two, until it reaches twenty-ninety-eight, then it gets nine for three-three, and it gets three-forty-two, until it reaches three-nine-twenty-seven, and so on, and then it is four hundred and forty-six, five and twenty-five, six and sixty-six, seven and seventy-nine, and seventy-seventy-nine, and finally ninety-nine-eighty-one.

Horizontal back: For example, the first horizontal line, one sentence one by one; the second is two sentences, one two gets two, two two gets four; And so on, the first few lines are a few sentences, and the last nine sentences go from nineteen to ninety-nine eighty-one. There is also a rule in this method, the first few lines, the next sentence is a few more than the previous sentence.

To recite the ninety-nine multiplication formula, you can back horizontally, vertically, or bend your back (back horizontally to the head, and then down).

It's easiest to memorize horizontally, because when elementary school students start to learn multiplication formulas, they learn them in the order of horizontal rows (the first line is the 1 formula, the second row is the 2 formula, and the third line is the 3 formula......).With an upright back, you can train your memory and become more proficient in mastering the mantra.