Elementary school math is smooth, what are the math smooth?

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A preliminary understanding of multiplication nursery rhymes.

Remember to multiply the equation, the same addition number is written first, the multiplication sign follows the addition number, and the last one is written as a number, and the number multiplied by how many is read, indicating the addition of several numbers.

The hour and minute hands recognize the song.

The fastest runner is the second hand, tall and in good shape;

The slowest runner is the hour hand, short and fat.

It is not tall or short is a minute hand, and it has a great effect on running at a constant speed.

The unit of length recognizes the song.

1 cm, very naughty, look carefully, only to see you.

Cover the nail 1 cm, stretch out the finger and compare it to the other.

It's about the same length as me, about a centimeter.

100 I'm 1 meter, I'm a little brother of the meter, don't use me when the object grows, or you may not be tired.

Pen mantra song.

The single digit and ten digits should be aligned, and the plus and minus signs should not be forgotten.

The horizontal line must be drawn straight, and the calculation should start from the single digit.

Add 1 to write below, subtraction 1 point above.

Greater than, less than.

He smiled at the big number.

Awareness of time and minute.

The number of the hour hand is over, that is, it means how many hours it is, how many minutes are more, please look at the minute hand carefully.

except".

See "divide", circle it, the word "divide" is preceded by the divisor, and the word "divide" is followed by the divisor, don't forget to swap positions.

Mathematics is a slip of the tongue for the following:

1. Multiplication formulas and nursery rhymes.

A frog has one mouth, two eyes and four legs. Two frogs with two mouths, four eyes and eight legs. Three frogs, three mouths, six eyes, and twelve legs. Four frogs open their mouths and jump into the water with a tom.

2. A number divided by several digits children's rhymes.

Let's start with the dividend.

The highest position, the high position is not enough for one more; Divide to which digit is divided, the quotient is written in which digit, if there is not enough quotient 1, write 0, and the quotient counts the first and last digits, and the remainder.

It should be smaller than the divisor so that the operation is correct.

3. Decimal addition and subtraction nursery rhyme.

It's easy to compare the size of the decimals, first put them all up, the decimal points, the digits should be right, and then compare them. First of all, compare the highest bit, the highest bit is the same as the lower bit. In the end, it is divided into high and low, which is higher and which is bigger.

Keep it in mind and don't forget. Division is a decimal division is a decimal and the shift is to be remembered. Move the decimal point so that it becomes an integer, move the divisor by a few digits, the dividend is the same amount, if the number is not enough, add 0 to fill the place.

4. Four mixed operation nursery rhymes.

Go through the whole topic plan and see if it can be simple; From left to right, multiply and divide first, then add and subtract; The parentheses are small, medium and large in order, first counting the inside and then the outside; Horizontal calculation and vertical inspection, step by step check is the key.

5. Solve the problem of nursery rhymes.

Read the question several times to find the key from it; Look at what you want first, and then look for conditions; Reasonable formulas and careful calculations; Seek multiple solutions to one problem, and the unit should not forget; The results should be checked, and the answers should be written at the end. understanding of length, area, volume, and volume; The length of a line, the area of a large area; The volume occupies the space, and the volume is counted inside.

6. Rounding up children's rhymes.

The rounding method is good, approximate numbers.

There is a way to find it; Take which one to look at the next position, and then compare it with the 5 characters; It is 5 big 5 forward 1, less than 5 all rounded;

The equal sign is replaced with an approximate equal sign, so that people can understand it at a glance.

7. The problem of chickens and rabbits in the same cage.

solution. Chickens have two legs and rabbits have four legs. Count the head and body first. Then press the chicken to divide the feet.

8. Sequence of operations.

Playing bamboo boards, even the sky, all the students listen to me. Today I don't put other tables, four calculations.

Let's talk about the mixed questions to be calculated, and a clear order is the key. The same level operation is the best, from left to right. Both levels of operation occur, first multiplying and dividing and then adding and subtracting. What to do if you encounter parentheses, the parentheses are counted first, and the parentheses are in the brackets.

Count inside and back, the order must not be messed up, every step is checked, and you are happy and happy.

9. Abdication and subtraction.

Abdication and subtraction should be kept in mind, starting from the single digit first; Which one is not enough to retire from the front, and don't forget the standard plus ten; If the next position is retreated by 1,0 to ten, it is best to remember.

10. Subtraction of continuous abdication.

See 0, go ahead and see which one is on it. Borrowed and walked backwards, 0 is a bit seen as 9.

1. Two-digit multiplication rule.

Integer multiplication starts from the low position, and two-digit multiplication is twice product. The single digit is multiplied by a number of ones, and the last digit of the product is against the single digit. The number of tens is multiplied by a number of tens, and the last digit of the product is paired with tens. Calculate the exact number of bits, and add the products of the two times together.

2. Two-digit multiplication.

Two-digit multiplication is not difficult, there are three points in the calculation process: the multiplier digit should be calculated first, and then multiplied by ten digits, and the last digit of the product is the key, and it should be paired with the ten digits; After the two times are added, the memory is calculated layer by layer.

3. Multi-digit multiplication rule.

Integer multiplication starts from the low level, and several digits are multiplied several times. The single digit is multiplied by a number of ones, and the last digit of the product is against the single digit. The number of tens is multiplied by a number of tens, and the last digit of the product is paired with tens. Calculate the exact number of bits, and add the product of several times together.

4. The law of decimal addition and subtraction.

There is a rule in the addition and subtraction of decimals, and the same digits should be aligned. Unit-to-unit, ten-to-ten. ......Tenths against tenths, percentiles against percentiles. ......In a word, the decimal point should be aligned. The result is a decimal with a 0 to be crossed out at the end.

5. The nature of the quotient is invariant.

The divisor and the divisor are multiplied at the same time, and the multiplication factor should be the same. The dividend, the divisor are the same as the divisor, and the number divided is the same. Multiplication and division are all excluded from 0, and the invariant nature of the quotient should be remembered.

Elementary school math slips away1. Large number reading.

Read from high to low, add hundreds of millions after hundreds of millions;

If there is a zero in the middle, read one, and if there is a zero at the end, it will not be read.

2. Write large numbers.

Write the number from the high position, which bit is a few to write a few, which bit has no unit, with 0 to keep in mind.

3. Comparison of multi-digit size.

Compare the digits first, then the left.

4. Operational order song.

For mixed questions to be calculated, a clear order is key.

The same level operation is the best to do, from left to right in turn, two levels of operation appear, first calculate multiplication and division and then add and subtract.

What to do if you encounter brackets, the parentheses are counted first, the brackets are counted later, the order must not be messed up, check every step of the calculation, and be happy and happy.

5. Test and change business.

Divide two digits by multiple digits, round to try quotients.

It is easy to test the quotient in four rounds, and gradually reduce 1 to the minor.

Five into the test quotient is easy to small, gradually add 1 to the major.

6. The divisor is the division of three places.

The divisor three looks at three, and three is not enough to see four.

Except for which businessman, memorize the mantra to determine the position.

The test business method should be flexible, not enough quotient 1,0 place.

The remainder is smaller than the divisor, and then the next digit is divided.

7. Measuring angles. The center is on the vertex, the 0 line is on one side, and the scale is read on the one side, and the inside and outside should be distinguished.

Prime number formulas within.

and 11,13 followed by ,(ten.

IX.II. iii. xxix), (iv.

Three, four. vii, fifty-three), (v.

IX.6. i. xxxvii), (vii.

I.VII. III. 79).

(viii.) III.VIII.

ix, ninety-seven).

9. Practical questions.

Don't panic before solving the problem, read the first question repeatedly, conditions, questions, and related sentences, and don't miss a word of positive and negative thinking.

With equations, don't forget, it is the strongest to make it easy.

Score questions, unit one, quantity and rate corresponding to detailed analysis, three categories of nine basic questions, you have to keep in mind.

Engineering questions and itinerary questions communicate with each other in positive and negative proportions, and the hypothetical method, invariants, and units must be unified.

Math slips by:

1. Two-step calculation application problems

Two-step calculation application questions, read the questions carefully and review the questions. The solution is linked one by one, and the middle problem is the key. The quantitative relationship should be accurate, and the calculation steps should be clarified. Grasp the two ends of the middle belt and answer the questions accurately.

2. Multi-digit reading songs.

The reading should start from the high position, which digit is the number to read; If there is a zero at the end of each level, you don't have to read it out in mind; The other digits are continuous zeros, and only one is read carefully; Add "10,000" at the end of 10,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,000,

3. Multi-digit writing songs.

Write the number from the high position, and write a few digits. Which digit has no unit, use "0" to keep in mind.

4. Multi-digit size comparison song.

The number of digits is different than the size, the number of bits is large, and the number of bits is small. The number of digits is the same as the size, and the high digits are known by the ratio.

The Importance of Grade 3 Learning:

From the beginning of the third grade, the questions are more difficult and more flexible. For example, math application questions will no longer have the kind of scoring questions that can be answered in one step.

Grade 3 is very important, it is the best period for children to develop their learning ability and develop good study habits. Because if you don't have a solid foundation in elementary school, you may not be able to start later. Mathematics, in particular, may require a lot of effort if it is to be added later.

From the third grade onwards, it is also necessary for parents to let their children learn to arrange their own time and learn to let them do their own arrangements. When doing homework, parents should try not to disturb their children, don't serve tea and pour water for a while, and give fruits and the like for a while, which can be done after the child finishes his homework.