1, subtraction of continuous abdication:

When you see 0, go and see which one has it.

Borrowed and walked back, 0 is a bit like 9.

2, multi-digit size comparison

The number of digits is different from the size, and the number of digits is more than the number of digits.

The number of digits is the same as the size, and the high position is known.

Greater than the symbol, less than the symbol, smiling at the big numbers,

You can't go wrong this way.

3. Year, month and day

1, 3, 5, 7, 8, 10, la (1February),

Thirty-one days is never bad.

Four, six, nine, winter (November) thirty whole;

Only February is the most special,

February 28th in a normal year and February 29th in a leap year.

4. Flat years and leap years

Leap in four years, leap in one hundred years, leap in four hundred years.

It is easy to judge a normal year and a leap year.

A unit is odd (singular), and there is a remainder at a glance;

The last two digits of the general year and the whole hundred years before 20 are judged by dividing by 4 respectively.

What is left is a normal year and a clean leap year.

5. The divider is the division of one digit.

One point one, one point two, (one point one)

Except for which dealer, (two vendors and three times less)

Divide by the number and be a sister. (More than four to five)

6, "Angle measurement"

"Point-to-point, side by side, find 0 degrees, identify the scale"

7. The divider is the division of two digits.

See two in two, two is not enough to see three.

Except which business, remember the formula and make a reservation.

The trial commercial law should be flexible, and the quotient "1" and "0" are not enough.

The remainder is less than the divisor and then divided by the next bit.

8. Division with 0 in the middle or at the end of quotient

I am 0, and I am good at division.

Not enough quotient 1. I'll make it up to you. I will sit when there is a vacancy.

If others want to get rid of me, I will always be the winner.

9. The meaning of "divide":

When you see "divide", circle it. There is a divisor in front of the word "divide".

Don't forget the dividend after the word "points".

10, math jingle for graduating class

At first glance, you should be serious.

Only when you are tempted;

There are dangers everywhere in the problem.

Be careful of the seat belt;

When calculating, the mind must be calm.

Writing neatly, not easily;

Inspection is like Monday morning quarterback,

The horse was startled by the gunfire behind him.

Count, don't worry,

Multiplication formula helps you,

Two plus three equals five,

Two or three get six clear records;

The condition in the question is red,

Units must be consistent and clear;

Cone volume is easy to make mistakes,

One third will get into trouble;

Don't underestimate the annular area,

The radius of the outer circle can be turned over.

Application questions, divided into types.

Unit 1, first determine,

The ratio of quantity corresponds to accuracy,

No change, thank you!

With you, you can do the right thing;

Proportional solution, very simple,

How difficult is the one-to-one correspondence;

Geometry problem, () welcome,

Just remember the formula correctly.

Want to paint, find tools,

Ruler, compass, protractor,

Draw high precision into vertical lines,

Parallelism is equidistant;

The measuring angles are triple coincident,

Accurately reading data;

Compass extend radius,

Diameter and circumference are not allowed.

Remember, this is advice,

I wish you good grades in the exam.

1 1, operating sequence song

Playing bamboo boards rang all over the sky. Listen to me, students

Today we will talk about four operations instead of other tables.

Clear order is the key to the calculation of mixed test questions.

The operation at the same level is the best, and it is calculated from left to right in turn.

There are two levels of operations, first multiplication and division, then addition and subtraction.

What should I do if I encounter parentheses? Parentheses take precedence.

After parentheses, the order cannot be out of order.

Check every step, and be happy when you are right.

Practical application of comparison scheme.

I plan to actually compare the application problems and analyze them carefully, so don't worry.

The relationship between quantity is very important, and the relationship between before and after is very subtle.

Write the relationship first, which leads to the solution to the problem.

The plan is actually on the left. Compare a line up and down.

The specific quantity should be reflected, and the constant quantity is the key.

Fill in the numbers correctly according to the quantity, and then fill in the blanks.

According to the equation, the arithmetic method is also simple.

Operation order of elementary arithmetic

Brackets, brackets, grab the first place,

Multiplication and division ranked second,

Finally, add and subtract. Whoever comes first counts first.