How to memorize multiplication formulas skillfully, how to memorize multiplication formulas?

I don't know if you're a parent or a student, if you're a parent, you can play with your child, and if you're a child, you can find a companion to play with.

1, prepare a deck of poker, the poker is divided into two parts, four suits of 1 9 a total of 36 cards for the community cards, 10, j, q, k, small king, king and other 18 as a part, the poker cards 10, j, q, k, small king, king are set to 10 points, 20 points, 30 points, 40 points, 50 points, 60 points, a total of 510 points. When playing, two people participate, the first part and the second part are placed separately, the two players take turns to draw two cards from the first part, multiply the value of the poker card, the product is the winner, the score won is the difference between the two products (rounded), according to the difference from the second part of the card to take the card representing the corresponding score, to the second part of the card to take the card, or set their own. Among them, you can get three times the score when you encounter "ninety-nine-eighty-one", and you will lose three times the score if you "get one by one".

The main purpose of this game is to improve the speed of children's multiplication formulas and two-digit addition and subtraction.

2. Intensive training. Let the child memorize a few mantras every night, horizontally, vertically, backwards, etc., to train the child in different ways. Once you're done, ask your child to do some exercises, such as three () two.

Ten. 7, 5 () 30; Or the child and the parent answer, the parent says "four-four", the child "sixteen"; Or maybe the parent says a number, and the child says the product of the word.

3. Prepare a deck of playing cards, pick out all the 2 9s, and divide them into two parts with the same number after scrambling, one for parents and one for children. Two people play their cards in turn, and whoever says the product of the value of the two cards first can take the opponent's card. For example, one out of 5, one out of 2, whoever says "10" first, who can win the opponent's card.

Parents can slow down at first to stimulate their children's interest.

1) Observe the single digit and the ten digits, multiply the number by nine, the ten digit is the number minus 1, and the unit digit is the number on the nine minus ten place, such as four nine thirty-six, five nine forty-five, six nine fifty-four and seven nine sixty-three.

2) Grasp the law and remember the decision.

1 9, 1 less than 10, is 9;

2 9s, 2 less than 20, is 18;

3 9s, 3 less than 30, is 27;

4 9s, 40 less than 40, is 36;

5 9s, 50 less than 50, is 45;

6 9s, 60 less than 60, is 54;

7 9s, 7 less than 70, is 63;

8 9s, 8 less than 80, is 72;

9 9s, 9 less than 90, is 81;

Pure backrest, usually do more questions, practice makes perfect.

1. Vertical recitation: For example, one by one gets one, one two gets two, and you can memorize it until you get nine in nine, then you can get four from two and two, and six from two and three until you get two ninety-eight, and then three and three get nine, and so on, and then there are four and forty-six vertical columns, and five five and twenty-five vertical columns. There is a rule in this method, the number of vertical columns, the number of gradually increase a few, which can help memory according to this rule.

Fuel rationing. <>2. Repeat the recitation: As long as you read it every day, write it every day, do it one line at a time, memorize the first line, then memorize the next line, and then memorize the next line with two lines together and then memorize it, and continue to memorize it repeatedly, plus parents remind and ask questions, and the child will soon master it.

3. Summarize the rules of recitation: When reciting the multiplication formula, the last formula at the end of each line is the formula obtained by multiplying the same number, for example, when you memorize the third line, you must multiply three by three as the last formula.

1. Start with one word.

Tell your child that when reciting the multiplication formula, you should recite it line by line, and that the first word at the beginning of each line must start with "one", for a total of nine lines, and each line begins with "one". In this way, the child will not be confused when reciting.

2. The number of rows follows.

It should also be noted that the first formula of each column is related to the row in which it is located. What I just said is that the first word in each column starts with "one", so what about the second word? We find that the second word is the number of lines it is in, just look at the position of the box in the picture. Pass.

The two characteristics of two and three can easily remember the first formula in each line.

3. Multiply the principal number by the principal number.

For example, if you memorize the third line, you must multiply three by three as the last formula, and when you memorize the fifth line, you should multiply five by the end of the line. Zhiyan shouted the end of each line, and immediately reflected the beginning of the downward movement.

4. There is a rule in the horizontal view.

We have also discovered such a rule, that is, horizontally, the second word of each line is the same, for example, in the second line, all the second words are "two", and in the fourth line, all the second words are "four", so it will be easier to teach children to memorize the brother and bring it.

5. The difference is the same number.

We will also find a rule, that is, the number of each column, the difference from top to bottom, is exactly the number of columns in which the equation is located, for example, in the first column, from top to bottom in order +1, in the third column, from top to bottom in order +3, mastering this rule, is more helpful for children's memorization and memory.