How to quickly learn the ninety nine multiplication table?

Uh, this one I suggest you look up the calculator for this one is faster.

Prepare a ninety-nine multiplication formula table, it doesn't matter what style, in order to facilitate the review with us, we used the ninety-nine multiplication table stationery box when we were children, I don't know if there is still one.

In order to make it easier to memorize, we can convert the ninety-nine multiplication table into the form of formulas and read it repeatedly and memorize it.

Children have good memory, but their interests are often not on this, so appropriate rewards should be given. Small toys are not expensive and can also stimulate children's enthusiasm. Some small combined transformers can also allow children to learn to use their brains.

Children can be taught vertically from easy to difficult.

It is also possible to teach small children horizontally with an unchanging multiplier.

See the remaining 2 images.

Finally, the multiplication formula table is transformed into fill-in-the-blank questions, such as 6x5=30, transformed into 6x()=30, and the child will be rewarded with a corresponding number of small toys if he answers correctly, and the child's enthusiasm will be improved. Repeat it for a few days and remember it.

While teaching children to memorize, it is also important for children to learn to understand the meaning of multiplication. In particular, the multiplication of the exchange multiplier and the multiplied by the multiplier, the product is unchanged. That is, seven eight fifty-six is enough, and eight seven fifty-six is no longer needed.

In the 90s, I learned multiplication in the second grade.

The ninety-nine multiplication table was learned in the first semester of the second year. Multiplication formulas.

It is the basic calculation rules for multiplication, division, square and other operations in ancient Chinese calculations, which have been used for more than 2,000 years.

In ancient times, the multiplication formula was from top to bottom, starting from "ninety-nine eighty-one" to "one by one", which was the opposite of the order used, so the ancients used the two words "ninety-nine" at the beginning of the multiplication formula as the name of this formula, also known as ninety-nine table, ninety-nine song, nine-cause song, ninety-nine multiplication table.

Basic properties of multiplication:

1. One factor expands (shrinks) n times, and the other factor remains unchanged, and the product also expands (shrinks) n times accordingly (n is not equal to 0).

2. One factor expands by n times, and the other factor expands by m times, and the product is also expanded by mn times (m, n are not equal to 0).

3. Multiplication can also be seen as calculating objects arranged in a rectangle (integer) or finding the area of a rectangle whose side length is given. The area of the rectangle does not depend on which side is measured first, which illustrates the commutative property. The result of both measurements is a new type of measurement, for example, multiplying the lengths of both sides of a rectangle to give its area, which is the subject of dimensional analysis.

At present, the "little ninety-nine" mantra that primary school students learn starts from "one by one to get one" and ends with "ninety-nine-eighty-one", but in ancient times, it was reversed, starting from "ninety-nine-eighty-one" and ending with "two-two-four".

Because the first two words of the formula are "ninety-nine", people refer to it as "little ninety-nine". It was only about the turn of the century that it was reversed, as it is now, "one by one, one to ninety-nine, eighty-one."

Ancient Babylon had a multiplication and carry system very early, but the operation process was not as simple and fast as the ninety-nine formula, which was not easy to remember.

The multiplication formula table for modern elementary school students is:

China used the "99 formula" of limb dressing groups 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.

1. Any number multiplied by 1 equals the number itself.

2. Any number multiplied by 2 can get an even number, and the last digit of the product appears 2, 4, 6, 8 twice, and 0 once.

Multiply each digit from 1 to 9, the last digit of the product is 1 to 9, and the sum of the ten digits of the product and the single digit is a multiple of 3.

4. Any number multiplied by 4 can get an even number, and the last digit of the product appears 2, 4, 6, 8 twice, and 0 once.

5. The last digit of the product of any number and 5 can only be 0 or 5.

The formula is $a2*b$1, and the method of making a ninety-nine multiplication table.

Refer to the following:1Start Excel2010 first, then fill the data region A2:A10 with 1-9, and then fill the data region B1:J1 with ZD1-9 in turn to see how the effect is, as shown in the following figure.

2.Enter the formula =$a 2*b$1 in cell b2 and press enter.

3.Then select a single inner unit b2 to fill downward, and then select the data to fill the right after filling, the area b2:b10, so as to calculate all the required product values, as shown in the figure below.

4.Select cell b2, modify its formula to =$a 2&x"&1b & A2*1b, and then click the OK button again as below screenshot.

5.Pull down to the right in turn, as shown below.

6.Select unit b2, continue to modify the function, modify it to = if ($a 2 > b $1, $a 2 &"x"& 1 b &"a2 * 1 b, "" enter after the modification is completed, and then fill in the right, forelimb as shown in the figure below.

7.Then select the data area b2:j2 and continue to fill it. The multiplication table will appear with Ant or.

8.Select the data area B2:J2, perform Ctrl+C key combination to copy, and select the Value option from Paste to paste only the values.

9.Remove the first row and the first column to familiarize us with the multiplication table, then select the data area A1:I9 to set the font to Song, the font size to 12, and set the border.