When calculating at the same level, calculate from left to right in turn;

Two-stage operation, first multiply and then divide, then add and subtract.

When there are brackets, count the inside of brackets first, and then count the outside of brackets;

When there are multiple brackets, count the brackets first, then the brackets inside, then the braces inside, and finally the brackets outside.

If there is a power, calculate the power first.

When performing mixed operations, the numbers in parentheses are calculated first, and the parentheses are from small to large. If there is a power, calculate the power first, and then from high to low.

Extended data:

Addition and subtraction algorithm

1, integer:

(1) Same number alignment

(2) Counting from the unit

(3) When it is added to dozens, it will be pushed to a higher position; If the subtraction is not enough, subtract 1 from the high position. When this number is added to 10, it will decrease.

2. Decimal number:

(1) decimal point alignment (that is, same digit alignment);

(2) calculation according to the law of integer addition and subtraction;

(3) Align the decimal point with the horizontal line in the number and point the decimal point;

Step 3 score

(1) Add and subtract fractions with the same denominator, and only add and subtract numerators;

(2) For the addition and subtraction of fractions with different denominators, the division operation is carried out first, and then the calculation is carried out according to the addition and subtraction algorithm of fractions with the same denominator;

(3) The quotation whose result is not the simplest score is divided into the simplest score.