How to calculate multiplication formulas with ten fingers

Method: Extend your hands, facing you, from left to right, with each finger representing a number from 1 to 10. Then semi-bend the first to ninth fingers from left to right, representing the product of 9 times a number.

Then bend the finger to the leftmost hand index to represent the number in the tens of the product, and the right hand index to represent the number in the single digit of the product.

For example, if you bend the fifth finger and you can see that there are four fingers on the left and five fingers on the right, then the product is forty-five, that is, five-nine-forty-five.

Memorize multiplication formulas.

Lay the foundation for proficient multiplication and division calculations. Multiplication formulas are one of the basic skills that Year 2 students must practice well. Whether you are familiar with the mantra is reflected in the oral arithmetic practice, the accuracy rate is not high, and the speed is extremely slow.

The multiplication formula is the basic calculation rules for multiplication, division, and square in ancient Chinese calculations, and has been used for more than 2,000 years. The ancient multiplication formula was from top to bottom, starting from "ninety-nine eighty-one" and ending with "one-to-one", which was the opposite of the order used now, 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-nine song, ninety-nine multiplication table.

Here's how to do it: Stretch your hands straight side by side, palms facing you, and each finger from the left represents a number from 1 to 10. Bend the first to ninth fingers from left to right to represent the product of 9 times a few (the hand index on the left side of the curved finger represents the number in the tenth digit of the product, and the hand index on the right hand represents the number in the unit digit of the product).

For example, if you bend the sixth finger and you can see that there are five fingers on the left and four fingers on the right, then the product is 54, which is six nine fifty-four.

If it's 2 times 8, how do you calculate it?

Multiplication formulas, finger mnemonics, is a simple and effective way to learn multiplication.

Familiarize students with the order in which the numbers are arranged in the multiplication table. Normally, we start with 1 1 = 1 and then learn 1 = 4 and so on until 9 1 = 9. Have your students observe their fingers and see what numbers each finger represents.

In general, the thumb represents 1, the index finger represents 2, the middle finger represents 3, the ring finger represents 4, and the little finger represents 5.

While reciting the multiplication formula, have the students perform finger movements at the same time. For example, when a student recites 2 3=6, he can have the thumb of his left hand point to 2 and his index finger to point to 3, and then say two or three at the same time to get six. After mastering the basic multiplication formula finger memorization, the difficulty can be gradually increased.

The multiplication formula finger memory method is a fun and practical way to learn multiplication. In this way, we can understand the structure of the multiplication table more intuitively, and it is easier to remember the multiplication results. Of course, this method is not the only way to learn multiplication, and parents and teachers can choose the learning method that suits their children according to their actual situation and interests.

Advantages of multiplication formulas finger mnemonics

Multiplication Formulas Finger Mnemonics Combine the number of hidden calendar words with gestures, so that students can understand and remember multiplication operations more intuitively. For example, when we want to remember that 3 times 4 equals 12, we can point the three fingers of the left hand to the four fingers of the right hand, thus forming a figure 3. This way of memorizing images helps students remember multiplication operations better.

Multiplication formulas, finger memorization, can help students quickly master basic multiplication operations. By repeating the exercises, students can quickly memorize the gestures corresponding to each number, so that they can react quickly when it is time to multiply.

Studies have shown that the use of gesture memory can improve a person's memory. When people combine information with actions, the brain is more actively involved in the memory process to improve memory. Therefore, the finger memory method of multiplication formulas can not only help students remember multiplication operations, but also improve their memory slowing and slag ability.

Extend your ten fingers and close them one by one.

In this process, the closing hand exponent represents another factor in addition to 9, subtract it by 1, and you get a ten-digit number; The index of a hand without closure is a single digit.

For example, 4 fingers are closed, and 6 are not closed;

So, it's 4 9 = 36, and 3 here is 4-1.

When testing, remember that 4+6=10 is ten hand indexes.

Stretch out your fingers and close them one by one.

In this process, the closed hand index Senki represents another factor in addition to 9, subtract it by 1, and the result is a ten-digit number; The index of a hand without closure is a single digit.

For example, 4 fingers are closed, and 6 are not closed;

Then, it is 4 9 = 36, and the 3 stool spring wheel here is obtained from 4-1.

When testing, remember that 4+6=10 is ten hand indexes.