Addition and subtraction: first press the data with the least number of digits after the decimal point, and keep the digits of other digits, and then add and subtract. The calculation results also keep the same number of digits after the decimal point. Multiplication and division: first leave the data of the least significant number to other numbers.
After multiplication and division, the calculation results still retain the same significant figures. Power sum root: when the data is power or root, the effective digits of the result should be the same as the original data.
What does digital operation mean?
The operations of numbers are integer addition, integer subtraction, integer multiplication and integer division. According to mathematical rules, the process of replacing or transforming a quantity or number to get the result of expression. It is the main content of mathematics research, and mathematics is the subject of studying quantity and its operation, graph and its transformation. The most basic operation of numbers is four operations.
Mathematical operation rule table, a technical term, is a mathematical tool. For example, the operation of merging two numbers into one number is called addition, each added number is called addend, and the added number is called sum.
Contents of mathematical operation:
Integer addition, the operation of combining two numbers into one number is called addition. In Djaafari, the added number is called addend, the added number is called addend, the addend is part number, the addend is sum, the addend is equal and one addend is equal and the other is addend.
Integer subtraction, knowing the sum of two addends, is called subtraction. In subtraction, known sum is called minuend, known addend is called subtraction, unknown addend is called difference, minuend is sum, subtraction and difference are partial numbers respectively, and addition and subtraction are reciprocal operations.
Integer multiplication is a simple operation to find the sum of several identical addends, which is called multiplication. In multiplication, the same addend and the number of the same addend are called factors, and the sum of the same addend is called product. In multiplication, 0 is multiplied by any number to get 0. 1, and any number is multiplied by any number.
Integer division, knowing the product of two factors and one of them, and finding the other factor is called division. In division, the known product is called dividend, the known factor is called divisor, and the calculated factor is called quotient. Multiplication and division are reciprocal operations.