1, dividend = quotient × divisor+remainder.
2. Remainder = dividend-quotient × divisor.
These two formulas can be used to solve the dividend and divisor. We can work out the dividend with the first formula. Suppose we know that the quotient is 5, the remainder is 3 and the divisor is 7, then the dividend is: dividend =5×7+3=38, and the divisor can be solved by the second formula. Suppose we know that the quotient is 5, the remainder is 3 and the dividend is 38, then the divisor is: divisor = (dividend-remainder)/quotient =(38-3)/5=7.
If the remainder is greater than or equal to the divisor, the quotient needs to be increased by 1. Because this means that the dividend can be divisible again, the quotient needs to be increased by 1.
Importance of mathematical calculation formula;
1. Mathematical formulas play a very important role in mathematics learning and application. They are the bridge between mathematical theory and practical application, and help us to better understand and solve practical problems.
2. Mathematical formulas can simplify complex mathematical problems and make it easier for us to solve difficult problems. In the face of complex mathematical problems, we may feel confused and helpless, but by using mathematical formulas, we can turn complex problems into simple and easy-to-understand steps, so that we can find the answers to them more easily.
3. It can help us get accurate calculation results faster. When dealing with a large number of data or making accurate calculations, using manual calculations or simple calculators may consume a lot of time and energy, and it is easy to make mistakes. However, using mathematical formulas can get accurate results faster and improve work efficiency.
4. Mathematical formula is the basis of mathematical discipline system. Mastering basic mathematical formulas can help us better understand the basic concepts and methods of mathematics and deepen our understanding of mathematics. At the same time, mastering mathematical formulas can also help us better master the knowledge of other disciplines, such as physics and chemistry.