Formula calculation is a recursive equation calculation, which is an operation to write out the calculation process completely, that is, vertical calculation. After studying vertical calculation, you will learn formulas that can be used for continuous calculation, such as mixed operation. When calculating mixed operations, it is generally to calculate a formula step by step (step by step, the original formula cannot be written with an equal sign), and the process of each step should be written out. Generally speaking, the equal sign should go forward and not be aligned with the first line. That is, to leave the original calculation.

Example:

(250÷50)+( 12×4)

=5+48

=53

( 125+8)x8

= 133x8

= 1064

Extended data:

Matters needing attention in the comprehensive formula:

1. If there is only addition and subtraction or only multiplication and division, it is calculated from left to right. For example, 2+ 1- 1=2, first calculate the number of 2+ 1, and then subtract 1 from the number of 2+ 1.

2. If primary operation and secondary operation exist at the same time, the secondary operation is calculated first.

3. If there are primary, secondary and tertiary operations (i.e. power, root and logarithm operations) at the same time, first calculate the tertiary operation, and then calculate the other two levels.

4. If there are brackets, count the numbers in brackets first (no matter what level, count first).

5. The third level should be counted in brackets, and then the second and first levels should be counted.

Addition: the operation of combining two numbers into one number.

Subtraction: when two addends and one of them are known, the operation of finding the other addend.

Multiplication: the operation of finding the product of two numbers.

1, a number multiplied by an integer, is a simple operation to find the sum of several identical addends.

2. Multiplying a number by a decimal is to find a few tenths, a few percent and a few thousandths of this number.

3. A number multiplied by a fraction is a fraction of this number.

Division: the operation of finding another factor by knowing the product of two factors and one of them.

Baidu Encyclopedia-Offline Computing