Integer division starts from the high order. One by one.

One is not enough to see two, except which business is which.

The remainder is less than the divisor, which is not enough for quotient one zero.

2. Divider is the division rule of two digits.

Integer division starts from the high order. Divide by two. Look at two.

Two is not enough to see three, except which business is which.

The remainder is less than the divisor, which is not enough for quotient one zero.

3, multi-digit division rule

Integer division starts from the high order. Divide by a few and see how many there are.

This is not enough to see the next one, except which one is for business.

The remainder is less than the divisor, which is not enough for quotient one zero.

4. Invariance of quotient

Dividend and divisor are multiplied at the same time, and the multiplication factors should be the same.

Divider and divisor are divided by the same number.

Multiply everything except 0,

Remember the immutability of quotient.

Extended data

Skills:

Elementary arithmetic in decimal system (1)

Decimal mixed operation is the same as integer mixed operation. Multiplication and division are calculated first and then addition and subtraction. If there are brackets, brackets are calculated first. When two decimal places are multiplied, the sum of the decimal places of the two digits is the decimal places of the product; When dividing two numbers, when the divisor is decimal, the divisor is converted into an integer by magnification before calculation.

(2) expansion method: when there is a multiple relationship between factors, it can be calculated by enlarging or reducing a certain multiple, and its essence is the expansion of the law of multiplication and distribution;

Clever calculation by expansion method: the distribution law or association law of multiplication is an effective method to solve the mixed calculation involving fractional multiplication; There is a multiple relationship between two or more numbers, and the calculation can be made simple by expanding or shrinking a multiple. It should be noted that when one is expanded and the other is reduced by a certain multiple, the product of quantity factors remains unchanged.

(3) Algebraic method: You can use the same letter to replace the same formula that appears repeatedly in the formula, and then simplify the formula containing letters into the simplest form, and then calculate.

Clever algebraic calculation: the fixed number method refers to replacing some identical and repeated formulas with letters for the convenience of calculation, and then converting the formulas containing letters into the simplest form for calculation; In the process of setting numbers, sometimes only one letter is needed, and sometimes two or more letters are needed.