Usually these calculation problems are simple mathematical operations, such as addition, subtraction, multiplication and division, proportion, percentage, fraction and so on. These topics are designed to make students master basic operations skillfully and cultivate their computing ability and logical thinking ability. For students of different grades, the difficulty will be different, but they are all relatively basic calculation topics.

In some exams or competitions, five calculation questions may be used as part of the pre-test to evaluate the mathematical ability of candidates. In other cases, the five calculation questions can be used as part of the exercise questions for students to practice independently and consolidate the basic knowledge.

As follows:

The calculation problem is to add, subtract, multiply and divide numbers according to the algorithm. Off-line calculation problem refers to the problem that needs to be calculated by recursive equation. Each line of calculation must be equal to the front, and the result is behind. You must operate from left to right according to the rule of "multiply first, then divide, then add and subtract", and count the numbers in parentheses, brackets and braces first. Various algorithms can be used to make its calculation simpler and more accurate.

Addition, subtraction, multiplication and division are called four operations. Among them, addition and subtraction are called first-order operations; Multiplication and division are called secondary operations. 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 the brackets first, and then the outside of the 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.

The first-grade calculation problem refers to the addition and subtraction calculation problem that the first-grade primary school students learn. The first grade is the starting point of primary school and the beginning of children's exposure to addition and subtraction. In the process of learning addition and subtraction, children need to do a lot of calculation exercises in order to master the principles and methods of addition and subtraction, and improve the accuracy and speed of oral calculation through such exercises.