variable remains unchanged, and the symbols look at the quadrants. As a parent, you may have forgotten the specific meaning of this classic jingle in mathematics, but I believe you can still say the next sentence skillfully after seeing the first sentence. Sometimes, a simple rhyme or rhyme can help children memorize the theorems and formulas in mathematics more vividly. Below are the math rhymes and rhymes related to mathematics for grades 1-6 of primary school compiled by the teacher. Hurry up and save them for your children!
First grade
Position and direction
Get up in the morning and face the sun, and use your brain to think about it;
The front is east, the back is west, the left is north, the right is south;
Stretch out your left and right hands, and remember the southeast and northwest;
The directions of the map are stipulated, the top is north and the bottom is south;
the left is west and the right is east. Children must distinguish them clearly.
one to five
1, 2, 3, 4, 5, there are only a handful of them.
1 flower, 2 candies, 3 monkeys, 4 books.
Beside the campus playground, there are 5 trees.
I can write, read, and count.
I can divide and group them, so I can remember them all.
three-dimensional graphics
three-dimensional graphics have characteristics, each with a different length.
Two-dimensional development is three-dimensional, and the plane and the three-dimensional must be clearly distinguished.
10 ways to make up children's songs
1919 are good friends, 2828 hold hands,
3737 are really close, 4646 go together.
Five or five made up a pair of hands. Children, clap your hands,
let’s put together ten, 9 to make 1, 8 to make 2,
7 to make 3 to 6 to make 4, two and five are just enough!
eleven to twenty
eleven to twenty, the arrangement is very Orderly. The following
is one more than the previous one. There are two digits in
, both of which are tens plus tens.
twenty it is different, twenty is hidden inside.
reading and writing numbers start from the high position.
When counting, think about it and use tens to count.
Understanding clocks
runs the second hand fastest, is tall and has a good figure;
runs the hour hand the slowest, is short and fat.
The minute hand is neither tall nor short, and running at a constant speed has a great effect.
20 Carry addition song
Look at large numbers, divide them into decimals, round up to ten, and add fractions.
Renminbi antiphonal song
Children, hurry up and line up, hold hands and talk to each other to see who can speak quickly and correctly.
The RMB unit is yuan, jiao, cents, and the advance rate is 10. Please keep in mind.
1 yuan is worth 10 jiao; 1 jiao is worth 10 points, and 1 yuan is equal to 100 points.
Grade 2
Addition and subtraction within 100 (written calculations)
When doing written calculations, pay attention to the same digits to be aligned;
Add from the ones digit first. If the ones digit reaches 10, move up to the tens digit.
subtraction method of should be kept in mind. Start subtracting from the ones digit first;
which digit is not enough to move forward, don’t forget to add ten to the basic digit;
if the other digit is retreated by 1, it is best to remember that 0 becomes ten.
html A preliminary understanding of 3 angles
Small angle, really simple, one vertex, two sides
The size of the angle, look at the fork, the bigger the fork, the bigger the angle. It doesn't matter if the sides get shorter.
Know the time
The hour hand passes by the number, which indicates the time.
If you want to ask how many points are added, please look at the minute hand carefully.
Addition meaning song
Addition is used to combine two numbers, and the result of addition is called sum. The digits of
are arranged from the right, don’t forget to add ten to one.
The meaning of subtraction song
Use subtraction from big to small. The result of subtraction is called difference. The digits of
are aligned from the right. If there is not enough digits, take the first digit.
abdication subtraction method
abdication subtraction should be remembered, start from the ones digit;
sees 0, go forward to see which digit has the count;
borrows and goes backward, the digit above 0 is regarded as 9. If
is not in the front position, don't forget to add ten to it. If
has a different position, it is better to remember that 0 becomes ten.
Integer addition rules
Integer addition has rules, and the same digits must be aligned.
and dissatisfied ten will fall into place, and those who are full of ten will move forward by one.
adds more than ten numbers and falls down, whichever one is added will fall down. The carry addends of
are added together, and the result is not different by half a cent.
Integer subtraction rules
Integer subtraction has rules, and the same digits must be aligned. When
is large, the drop difference is reduced, and when it is small, it is borrowed.
borrows one, subtracts ten, and then adds. The result of addition and subtraction is put in the original position.
should be careful when borrowing continuously, and keep in mind the remaining number after borrowing.
Third grade
Hours, minutes and seconds
runs fastest on the second hand, he is tall and has a good figure;
runs slowest on the hour hand, is short and fat.
The minute hand is neither high nor short, and the effect of running at a constant speed is great.
The understanding of hours and minutes. When the hour hand passes the number, it means how many hours it is.
How many minutes are there? Please look carefully at the minute hand.
Multi-digit reading method song
The reading should start from the high position, and read which digit is the number;
If there is a zero at the end of each level, do not read it out and remember it;
Other digits have consecutive zeros, read only one and remember it carefully;
The four numbers are one level, the individual levels are ten thousand level and the billion level
. Add "ten thousand" at the end of the ten thousand level, and add "hundred million" at the end of the billion level.
one-digit multiplication rule
Integer multiplication starting from the lowest, one-digit multiplication One time accumulation.
single digits are multiplied by one, and the last digit of the product is the ones digit.
calculates accurately and correctly, based on the multiplication formula.
Symmetry
Let me recognize the symmetrical figure,
A straight line divides the picture.
Divide the picture into two pieces of different sizes, etc.
The same shape is symmetry.
The perimeter of a square
Square, calculate the perimeter,
Multiply the side length by four, I applaud.
can add the four side lengths, and
can calculate the perimeter. I am also good at it.
Perimeter of a rectangle
A rectangle has length and width.
There are three ways to calculate the perimeter. There are parentheses in adding the length and width of
. It is easiest to multiply the result by two.
Perimeter two method I would say,
length times two width times two and then sum.
I used the three method to calculate the perimeter,
I added the length and width, and
I used a total of four numbers to find the sum.
deserves praise for the correct calculation.
Fourth grade
Two-digit multiplication rules
Integer multiplication starts from the low-order, and two-digit multiplication is the product of two times.
single digits are multiplied by one, and the last digit of the product is the ones digit.
How many tens are obtained by multiplying the tens digit, and the last digit of the product is the tens digit. The calculation of
is accurate and the two products are added together.
Two-digit multiplication
Two-digit multiplication is not difficult. There are three points in the calculation process:
The single digit of the multiplier must be calculated first, and then multiplied by the tens digit. The last digit of the
product is the key, and it must be aligned with the tens digit; After adding the two products of
, it takes time to calculate and remember.
multi-digit multiplication rules
Integer multiplication starting from the lowest, multiplication of several digits and several products.
single digits are multiplied by one, and the last digit of the product is the ones digit.
How many tens are obtained by multiplying the tens digit, and the last digit of the product is the tens digit.
calculates the correct bits accurately, and the products of several times are added together.
Rules for adding and subtracting decimals
There are rules for adding and subtracting decimals, and the same digits must be aligned.
ones digit to ones digit, tens digit to tens digit. ...
The tenth place is against the tenth place, and the hundredth place is against the hundredth place. ...
In a word, the decimal points must be aligned. The calculation result of
is a decimal, and there are 0s at the end that need to be crossed out.
The property of constant quotient
The dividend and divisor are multiplied at the same time, and the factors of the multiplication must be the same.
The dividend and divisor are the same as division, and the numbers divided by are also the same.
Except for 0 when multiplying and dividing, remember clearly that the quotient remains unchanged.
"Year, month, day" jingle
One, three, five, seven, eight, ten, December, 31 days are always big.
April, Saturday, September and November, 30 days will never go wrong.
February is the most special month, with changes coming on the 28th and 29th.
It is twenty-nine in a leap year, and twenty-eight in a normal year.
4 In addition to the year number, there are extra pings, and the centenary number is marked with double 0s.
Rounding method nursery rhyme
The rounding method is good, there is a way to find approximate numbers;
looks at the lower digit, and then compares it with the word 5;
is 5, big 5, forward 1, and all numbers with small 5 are discarded;
equal sign Replace it with an equal sign so that people can understand it at a glance.
Sequence of Operations Tips
To calculate mixed test questions, clear order is the key.
is the easiest to perform operations at the same level, from left to right. Both levels of operations in
appear, with multiplication and division first and then addition and subtraction. What should I do if
encounters brackets? The brackets are small, medium and large.
Small brackets are counted first, square brackets are counted last.
The order must not be messed up. Horizontal calculation and vertical test
are checked every step of the calculation. It is correct, fast and beautiful.
rewrite the multi-digit song
html, remove the "0" after the 00,000 digits, and add the 10,000 characters to complete the change. html Remove the "0" after the billion digits, add a billion characters and change it.Division with 0 in the middle or at the end
I am 0, I am very capable, and my division operation shows my magical power. If
is not enough, I will make up for it. When a seat becomes available, I take it.
If others want to get rid of me, I will always be the victorious general.
Grade 5
Comparison of fractions
Comparison of fractions, remember the numerator and denominator well.
If the denominators are the same, look at the numerator. The larger the numerator is, the larger the fraction will be. If
has the same numerators, look at the denominator. If the denominator is larger, the fraction will be smaller.
The divisor is a decimal division.
The divisor is a decimal. The shift should be remembered.
moves the decimal point to make it an integer,
moves the divisor by a certain number, and moves the dividend by a certain number. If
does not have enough digits, add 0 to fill the digits.
Decimal multiplication rules
Decimal multiplication starting from the lowest digit, first calculate the product as an integer.
Let's look at the total number of decimals in the factor. Starting from the right side of the product,
will count the number of decimals and click on them. There are 0s at the end that need to be crossed out.
Decimal division rules
Decimal division starting from the top, looking at the divisors to find the rules. The divisor of
is a direct division of integers. When dividing to which quotient digit
is not enough, the quotient is occupied by zero, and the quotient and dividend points are aligned. The divisor of
is converted from a decimal to an integer, and the decimal point of the dividend is moved to the same position. If there are not enough digits on the right side of
, zeros should be used to fill them.
number pair song
indicates that the position has a trick, a set of data marks the position.
The number on the left is the column and the right is the row. The column is row first and then cannot be adjusted.
The formula for prime numbers within 3100
2, 3, 5, 7 and 11, 13 is followed by 17,
19, 23, 29, (nineteen, two three, twenty-nine )
31, 37, 41, (three-one, three-seven, forty-one)
43, 47, 53, (four-three, four-seven, fifty-three)
59, 61, 67, (five-nine, sixty-one, sixty 7)
71, 73, 79, (seventy-one, seventy-three, seventy-nine)
83, 89, 97. (eighty-three, eighty-nine, ninety-seven)
Judgment song of co-prime numbers
Fraction ratio simplification, co-prime numbers both ends.
observed five points: 1 and all numbers;
two adjacent numbers; two primes must be mutually prime.
Large numbers are prime numbers, and two numbers must be relatively prime.
Decimal numbers are prime numbers, large numbers are not multiples.
Sixth grade
Multiply fractions by integers
Multiply fractions by integers, the calculation is very simple;
multiply the numerator by an integer, and the denominator does not need to be changed;
If you want to make the calculation simple, must be divided into first;
If you want the result to be accurate, fractionalization is the simplest.
Mixed operations and simple operations of fraction multiplication
Four mixed operations of fractions, keep the order of operations in mind.
There are no parentheses for multiplication, addition, multiplication and subtraction. Addition and subtraction come last and multiplication comes first.
Level 1 and level 2 will be counted, and level 2 will be counted before level 1.
has changed the bracket order, counting the inside first and then the outside. The operation rules of
are still useful, and it becomes easier to use them properly.
Fraction multiplication rules
Fraction multiplication is simpler, the numerator and denominator are calculated separately.
The numerator is multiplied by the numerator, and the denominator is multiplied by the denominator.
The numerator and denominator are not mutually prime, so reduce them first and then calculate.
Fraction division rules
Fraction division is the simplest, it can be calculated by conversion and multiplication.
After the division sign becomes a multiplication sign, the reciprocal of the divisor will appear.
Fraction multiplication and division
Fraction multiplication is easy to learn, multiply the numerator and denominator separately. The meaning of the
expression must be clarified, and it is easier to make up and down calculations.
The method of dividing fractions is wonderful, the original division sign is changed into a multiplication sign.
has the divisors reversed, which is indispensable for calculations.
approximation song
approximation, approximation, multiplication, approximation, saving time and effort.
From top to bottom, from left to right, clarify the data without missing a beat. When
encounters a decimal, it will round off the dots and make it an integer. If there are not enough digits, use "zero" to make up for it.
Find the unit "1" jingle
The unit "1" is cleverly hidden and will find you based on the score.
Stand well in front of "among them", and sit well behind "is, account for, ratio";
"Question and answer style" can be found, and supplementary explanations must be done well.
Percentage is often encountered, it is polite not to use the word "rate".
Find a pair of good friends, and then determine the multiplication and division signs.
